What are the cheapest airlines flying from St. Louis to London round-trip?

Scandinavian Airlines, at £530, was found to be the cheapest airline from St. Louis to London.Alternate airlines flying return to your destination include Delta and British Airways. Users have found that Scandinavian Airlines is 22% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St. Louis to London one-way?

The cheapet airlines for a one-way flight from St. Louis to London are Air Canada (£345), KLM (£349), and United Airlines (£350).

What is the cheapest day to fly from St. Louis to London?

Travellers seeking maximum savings on their St. Louis to London flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from St. Louis to London?

While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London City, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.

What are the most popular airlines that fly from St. Louis to London?

American Airlines, Air Canada and British Airways are the most popular airlines when flying from St. Louis to London.

What is the cheapest day to fly round-trip from St. Louis to London?

Wednesday flights are generally found to be more expensive for flights from St. Louis to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from St. Louis to London?

To save up to 26% on this flight, we recommend booking at least 27 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to London from £633 1-2 weeks out and tickets from £633 for flights departing within the next 72 hours.

What is the cheapest month to fly from St. Louis to London?

April is one of the best times of the year to fly to London from St. Louis. Prices for April average £686 per person but you can even find prices for as low as £500. The most expensive prices can be found in the month of June. Opting for a April flight can save you 29% on your journey compared to booking in June

What airport do you fly from for flights from St. Louis to London?

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 0 outbound flights to London per day from 5 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Can I find deals for flights from St. Louis to London that include hotel bookings?

Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from St. Louis to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.

Can I find deals for business class flights from St. Louis to London?

Yes. Cheapflights offers flight deals from St. Louis to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£228+ Flights from St. Louis to London - Compare & Save Big

Cheapflights Tip: The best prices from Lambert-St Louis to London are usually found in April or November, booked 26 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to London

Round-trip from	£530
One-way from	£228
Popular in	June
Cheapest in	April
Average price	£579

Scandinavian Airlines
14/10-22/10
5 total stops
43h 04m total
St. Louis to London

Search Deals

25/7
2 total stops
44h 40m total
St. Louis to London

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£96 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£14 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from St. Louis to London

Cheapest flights from St. Louis to London
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Tue 14/1013:30STL - LHR

2 stops20h 30mScandinavian Airlines

Wed 22/1007:05LHR - STL

3 stops22h 34mScandinavian Airlines

Deal found 28/4£530

Mon 18/813:30STL - LHR

1 stop14h 30mMultiple Airlines

Tue 26/806:50LHR - STL

2 stops19h 10mMultiple Airlines

Deal found 27/4£557

Mon 25/813:30STL - LGW

2 stops14h 30mDelta

Thu 4/912:00LGW - STL

2 stops17h 01mDelta

Deal found 28/4£561

Wed 20/813:37STL - LHR

1 stop11h 13mBritish Airways

Wed 27/812:30LHR - STL

1 stop12h 38mBritish Airways

Deal found 28/4£566

Sat 10/517:45STL - LGW

2 stops38h 55mMultiple Airlines

Tue 13/514:00LGW - STL

1 stop16h 06mMultiple Airlines

Deal found 27/4£566

Mon 24/1111:45STL - LHR

1 stop17h 30mUnited Airlines

Fri 5/1206:30LHR - STL

2 stops14h 56mUnited Airlines

Deal found 27/4£567

Wed 20/813:30STL - LHR

2 stops13h 05mAir Canada

Wed 27/809:30LHR - STL

2 stops35h 03mAir Canada

Deal found 28/4£569

Mon 25/809:00STL - LHR

1 stop16h 15mDelta

Thu 4/906:30LHR - STL

2 stops16h 17mDelta

Deal found 28/4£579

Tue 9/920:01STL - LCY

2 stops38h 29mBritish Airways

Tue 23/919:00LCY - STL

2 stops31h 21mBritish Airways

Deal found 28/4£616

Mon 24/1113:27STL - LCY

2 stops17h 23mMultiple Airlines

Fri 5/1210:00LCY - STL

2 stops29h 48mMultiple Airlines

Deal found 27/4£617

Sun 14/917:30STL - LCY

2 stops19h 05mLufthansa

Tue 23/908:45LCY - STL

1 stop34h 45mLufthansa

Deal found 28/4£624

Fri 12/917:30STL - LHR

2 stops22h 40mLufthansa

Fri 19/906:30LHR - STL

1 stop13h 00mLufthansa

Deal found 28/4£629

Best flights from St. Louis to London
Discover carefully curated flight deals from St. Louis to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 April 2025.

Tue 14/1013:30STL - LHR

2 stops20h 30mScandinavian Airlines

Wed 22/1007:05LHR - STL

3 stops22h 34mScandinavian Airlines

Deal found 28/4£530

Mon 18/813:30STL - LHR

1 stop14h 30mMultiple Airlines

Tue 26/806:50LHR - STL

2 stops19h 10mMultiple Airlines

Deal found 27/4£557

Mon 25/813:30STL - LGW

2 stops14h 30mDelta

Thu 4/912:00LGW - STL

2 stops17h 01mDelta

Deal found 28/4£561

Wed 20/813:37STL - LHR

1 stop11h 13mBritish Airways

Wed 27/812:30LHR - STL

1 stop12h 38mBritish Airways

Deal found 28/4£566

Wed 20/813:30STL - LHR

2 stops13h 05mAir Canada

Wed 27/809:30LHR - STL

2 stops35h 03mAir Canada

Deal found 28/4£569

Sat 11/1016:05STL - LHR

1 stop32h 30mUnited Airlines

Tue 21/1014:05LHR - STL

2 stops26h 29mUnited Airlines

Deal found 28/4£574

Sun 14/917:30STL - LCY

2 stops19h 05mLufthansa

Tue 23/908:45LCY - STL

1 stop34h 45mLufthansa

Deal found 28/4£624

Fri 29/814:39STL - LHR

1 stop11h 26mIberia

Fri 5/915:30LHR - STL

1 stop14h 19mIberia

Deal found 26/4£642

Fri 29/810:45STL - LHR

2 stops14h 00mVirgin Atlantic

Fri 5/906:30LHR - STL

2 stops15h 28mVirgin Atlantic

Deal found 26/4£662

Sun 12/1018:27STL - LCY

2 stops17h 03mAer Lingus

Sat 18/1011:30LCY - STL

2 stops38h 31mAer Lingus

Deal found 27/4£804

Fri 4/709:24STL - LGW

2 stops16h 46mAmerican Airlines

Fri 11/712:20LGW - STL

2 stops17h 39mAmerican Airlines

Deal found 27/4£824

Thu 10/719:05STL - LGW

2 stops32h 55mKLM

Wed 23/712:00LGW - STL

2 stops17h 53mKLM

Deal found 27/4£959

Last-minute flights from St. Louis to London
Discover last-minute flight deals from St. Louis to London. Data last updated 29 April 2025 and is based on user searches.

Fri 2/516:05STL - LHR

2 stops17h 55mScandinavian Airlines

Sun 11/521:05LHR - STL

3 stops29h 34mScandinavian Airlines

Deal found 27/4£784

Sat 3/513:30STL - LHR

1 stop14h 30mAir Canada

Sat 10/509:30LHR - STL

1 stop16h 28mAir Canada

Deal found 28/4£766

Sat 3/508:00STL - LGW

3 stops20h 45mMultiple Airlines

Sat 10/512:40LGW - STL

3 stops29h 39mMultiple Airlines

Deal found 28/4£1,306

Mon 5/505:20STL - LHR

1 stop25h 00mUnited Airlines

Thu 15/517:40LHR - STL

1 stop24h 56mUnited Airlines

Deal found 27/4£691

Mon 5/515:43STL - LGW

2 stops24h 37mTurkish Airlines

Thu 15/510:55LGW - STL

2 stops33h 52mTurkish Airlines

Deal found 27/4£1,081

Mon 5/513:46STL - LCY

2 stops13h 44mDelta

Thu 15/509:20LCY - STL

2 stops17h 29mDelta

Deal found 28/4£1,117

Mon 5/516:05STL - LHR

2 stops19h 35mScandinavian Airlines

Thu 15/521:05LHR - STL

3 stops29h 34mScandinavian Airlines

Deal found 28/4£1,369

Tue 6/513:30STL - LHR

1 stop11h 00mMultiple Airlines

Wed 14/510:30LHR - STL

2 stops15h 28mMultiple Airlines

Deal found 28/4£671

Sat 10/517:45STL - LGW

2 stops38h 55mMultiple Airlines

Tue 13/514:00LGW - STL

1 stop16h 06mMultiple Airlines

Deal found 27/4£566

Sat 10/517:00STL - LHR

1 stop31h 45mVirgin Atlantic

Sat 24/512:25LHR - STL

1 stop17h 01mVirgin Atlantic

Deal found 27/4£838

Sun 18/507:30STL - LHR

1 stop22h 20mMultiple Airlines

Wed 28/510:30LHR - STL

2 stops15h 28mMultiple Airlines

Deal found 27/4£632

Mon 19/519:30STL - LHR

1 stop10h 45mBritish Airways

Fri 30/512:00LHR - STL

1 stop13h 29mBritish Airways

Deal found 27/4£645

One-way flights from St. Louis to London
Search for one-way flight options from St. Louis to London. Find affordable one-way fares based on user searches. Data last updated 29 April 2025.

Fri 25/717:40STL - LHR

2 stops44h 40mMultiple Airlines

Deal found 27/4£228

Sat 12/719:29STL - LGW

2 stops32h 41mMultiple Airlines

Deal found 27/4£236

Fri 25/709:15STL - STN

2 stops27h 10mMultiple Airlines

Deal found 27/4£317

Fri 25/709:15STL - LTN

2 stops28h 40mMultiple Airlines

Deal found 27/4£323

Mon 25/809:17STL - LHR

2 stops18h 43mAir Canada

Deal found 28/4£345

Mon 25/817:40STL - LHR

1 stop11h 30mKLM

Deal found 28/4£349

Fri 19/916:05STL - LHR

2 stops46h 55mUnited Airlines

Deal found 27/4£350

Wed 7/513:38STL - LHR

2 stops17h 47mAer Lingus

Deal found 28/4£366

Mon 25/815:20STL - LCY

2 stops15h 10mUnited Airlines

Deal found 28/4£375

Thu 11/913:30STL - LHR

2 stops14h 45mDelta

Deal found 28/4£386

Thu 11/908:26STL - LCY

2 stops30h 44mBritish Airways

Deal found 28/4£406

Fri 19/912:10STL - LCY

2 stops14h 00mDelta

Deal found 27/4£416

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 14/10

13:30-16:00

2 stops20h 30m

London Heathrow

Wed 22/10

07:05-23:39

3 stops22h 34m

£530

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 18/8

13:30-10:00

1 stop14h 30m

London Heathrow

Tue 26/8

06:50-20:00

2 stops19h 10m

£557

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Mon 25/8

13:30-10:00

2 stops14h 30m

London Gatwick

Thu 4/9

12:00-23:01

2 stops17h 01m

£561

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 20/8

13:37-06:50

1 stop11h 13m

London Heathrow

Wed 27/8

12:30-19:08

1 stop12h 38m

£566

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Sat 10/5

17:45-14:40

2 stops38h 55m

London Gatwick

Tue 13/5

14:00-00:06

1 stop16h 06m

£566

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 20/8

13:30-06:30

1 stop11h 00m

London Heathrow

Wed 27/8

09:30-14:33

2 stops35h 03m

£569

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sat 11/10

16:05-06:35

1 stop32h 30m

London Heathrow

Tue 21/10

14:05-10:34

2 stops26h 29m

£574

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 25/8

09:00-07:15

1 stop16h 15m

London Heathrow

Thu 4/9

06:30-16:47

2 stops16h 17m

£579

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Tue 9/9

20:01-16:30

2 stops38h 29m

London City

Tue 23/9

19:00-20:21

2 stops31h 21m

£616

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Sun 14/9

17:30-18:35

2 stops19h 05m

London City

Tue 23/9

08:45-13:30

1 stop34h 45m

£624

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 46 results

...

Best time to book a flight from St. Louis to London

Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to London

How far ahead should I book a flight from St. Louis to London?

Booking 26 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to London?

Currently, January is the cheapest month in which you can book a flight from St. Louis to London (average of £112). Flying from St. Louis to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to LON?

It’s optimal to fly from St. Louis to London in the morning. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight in the evening.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Read through reviews of airlines operating flights from St. Louis to London, such as Delta, KLM and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,929 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,696 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.4

Good

642 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Turkish Airlines

7.3

Good

3,785 reviews

Delta

8.0

Very Good

7,929 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from St. Louis to London?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 0 outbound flights to London per day from 5 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
What are the cheapest airlines flying from St. Louis to London round-trip?
Scandinavian Airlines, at £530, was found to be the cheapest airline from St. Louis to London.Alternate airlines flying return to your destination include Delta and British Airways. Users have found that Scandinavian Airlines is 22% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from St. Louis to London one-way?
The cheapet airlines for a one-way flight from St. Louis to London are Air Canada (£345), KLM (£349), and United Airlines (£350).
What are the most popular routes from St. Louis to London?
While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London City, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.
Can I find deals for flights from St. Louis to London that include hotel bookings?
Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from St. Louis to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.
Can I find deals for business class flights from St. Louis to London?
Yes. Cheapflights offers flight deals from St. Louis to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to London?
Currently, January is the cheapest month in which you can book a flight from St. Louis to London (average of £112). Flying from St. Louis to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Deal

Hounslow

Milton Keynes

Gatwick

Luton

Slough

Croydon

Eastbourne

Ilford

Hayes

Southend-on-Sea

Crawley

Wembley

Ipswich

Maidstone

Winchester

Folkestone

Dartford

Watford

Chichester

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from St. Louis to London

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest£500	Average£663	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
British Airways	Cheapest£502	Average£738	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£526	Average£826	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£533	Average£802	FlexibilityNo cancel fee	On-time75%	Search KLM flights
American Airlines	Cheapest£586	Average£1,001	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from St. Louis to London?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to London?

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from St. Louis to London with no change fees?

Yes! Cheapflights helps users easily find flights from St. Louis to London with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to London become cheaper?

Yes! Start tracking prices for St. Louis to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from St. Louis to London from £228

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Lambert-St Louis to London are usually found in April or November, booked 26 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to London

Cheapest flights from St. Louis to LondonExplore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to London that are best for you.

Best time to book a flight from St. Louis to London

Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to London

How far ahead should I book a flight from St. Louis to London?

Use this chart to determine the optimal time to book a return flight from St. Louis to London. Price data was last updated on 25 April 2025.

What is the cheapest month to book a flight from St. Louis to London?

What is the cheapest time of day to fly from STL to LON?

Find hourly flight availability from St. Louis to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 29 April 2025.

Read through reviews of airlines operating flights from St. Louis to London, such as Delta, KLM and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to London?

What are the cheapest airlines flying from St. Louis to London round-trip?

What are the cheapest airlines to fly from St. Louis to London one-way?

What are the most popular routes from St. Louis to London?

Can I find deals for flights from St. Louis to London that include hotel bookings?

How can I find direct flights from St. Louis to London?

Can I find deals for business class flights from St. Louis to London?

What is the cheapest month to book a flight from St. Louis to London?

Travelling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from St. Louis to London

Fly with Cheapflights

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How does Cheapflights help users find flights from St. Louis to London?

Why should you use Cheapflights to find cheap flight tickets from St. Louis to London?

Can Cheapflights find flights from St. Louis to London with no change fees?

Can Cheapflights notify me if prices for flights from St. Louis to London become cheaper?

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Cheapest flights from St. Louis to London
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.