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

Air Canada, at £543, was found to be the cheapest airline from St. Louis to London.Alternate airlines flying return to your destination include Delta and United Airlines. Users have found that Air Canada is 21% 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 American Airlines (£308), Air Canada (£312), and United Airlines (£316).

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 23% on this flight, we recommend booking at least 52 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 £623 1-2 weeks out and tickets from £623 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 £693 per person but you can even find prices for as low as £492. The most expensive prices can be found in the month of June. Opting for a April flight can save you 39% 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.

£146+ Flights from St. Louis to London

Cheapflights Tip: The best prices from Lambert-St Louis to London are usually found in April or October, booked 51 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	£543
One-way from	£146
Popular in	June
Cheapest in	April
Average price	£969

Air Canada
19/8-28/8
4 total stops
29h 46m total
St. Louis to London

Search Deals

16/7
1 total stop
16h 36m total
St. Louis to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£121 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 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 13 June 2025.

Tue 19/809:15STL - LHR

2 stops15h 15mAir Canada

Thu 28/806:50LHR - STL

2 stops14h 31mAir Canada

Deal found 9/6£543

Wed 20/813:26STL - LHR

1 stop18h 04mDelta

Wed 27/806:15LHR - STL

2 stops16h 30mDelta

Deal found 10/6£546

Tue 21/1011:39STL - LHR

1 stop12h 16mUnited Airlines

Tue 28/1013:30LHR - STL

1 stop30h 25mUnited Airlines

Deal found 12/6£549

Fri 12/908:44STL - LGW

3 stops28h 46mMultiple Airlines

Sun 21/913:05LGW - STL

2 stops24h 44mMultiple Airlines

Deal found 11/6£550

Tue 23/913:53STL - LHR

2 stops24h 52mIberia

Wed 8/1017:10LHR - STL

2 stops36h 39mIberia

Deal found 11/6£550

Mon 14/717:27STL - LHR

1 stop13h 18mBritish Airways

Mon 21/712:30LHR - STL

1 stop13h 54mBritish Airways

Deal found 11/6£551

Tue 5/809:15STL - STN

3 stops21h 25mMultiple Airlines

Tue 19/814:50STN - STL

2 stops35h 10mMultiple Airlines

Deal found 12/6£552

Sun 7/909:15STL - LHR

2 stops15h 15mMultiple Airlines

Sun 14/906:50LHR - STL

2 stops19h 07mMultiple Airlines

Deal found 11/6£553

Wed 23/710:30STL - LGW

2 stops17h 30mDelta

Sat 2/812:00LGW - STL

2 stops17h 20mDelta

Deal found 10/6£555

Wed 10/915:30STL - LHR

1 stop13h 10mLufthansa

Mon 22/918:30LHR - STL

2 stops27h 14mLufthansa

Deal found 10/6£573

Fri 25/719:11STL - LHR

1 stop12h 19mVirgin Atlantic

Fri 1/809:40LHR - STL

2 stops18h 02mVirgin Atlantic

Deal found 11/6£579

Tue 7/1009:42STL - LGW

2 stops16h 28mAmerican Airlines

Sun 19/1012:20LGW - STL

2 stops17h 09mAmerican Airlines

Deal found 10/6£580

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 13 June 2025.

Tue 19/809:15STL - LHR

2 stops15h 15mAir Canada

Thu 28/806:50LHR - STL

2 stops14h 31mAir Canada

Deal found 9/6£543

Wed 20/813:26STL - LHR

1 stop18h 04mDelta

Wed 27/806:15LHR - STL

2 stops16h 30mDelta

Deal found 10/6£546

Tue 21/1011:39STL - LHR

1 stop12h 16mUnited Airlines

Tue 28/1013:30LHR - STL

1 stop30h 25mUnited Airlines

Deal found 12/6£549

Fri 12/908:44STL - LGW

3 stops28h 46mMultiple Airlines

Sun 21/913:05LGW - STL

2 stops24h 44mMultiple Airlines

Deal found 11/6£550

Tue 23/913:53STL - LHR

2 stops24h 52mIberia

Wed 8/1017:10LHR - STL

2 stops36h 39mIberia

Deal found 11/6£550

Mon 14/717:27STL - LHR

1 stop13h 18mBritish Airways

Mon 21/712:30LHR - STL

1 stop13h 54mBritish Airways

Deal found 11/6£551

Wed 10/915:30STL - LHR

1 stop13h 10mLufthansa

Mon 22/918:30LHR - STL

2 stops27h 14mLufthansa

Deal found 10/6£573

Fri 25/719:11STL - LHR

1 stop12h 19mVirgin Atlantic

Fri 1/809:40LHR - STL

2 stops18h 02mVirgin Atlantic

Deal found 11/6£579

Tue 7/1009:42STL - LGW

2 stops16h 28mAmerican Airlines

Sun 19/1012:20LGW - STL

2 stops17h 09mAmerican Airlines

Deal found 10/6£580

Mon 28/715:41STL - LHR

2 stops19h 59mScandinavian Airlines

Thu 14/806:40LHR - STL

2 stops20h 47mScandinavian Airlines

Deal found 12/6£581

Thu 24/717:37STL - LHR

1 stop13h 33mKLM

Sat 2/812:25LHR - STL

1 stop16h 55mKLM

Deal found 12/6£619

Fri 18/719:11STL - LGW

2 stops32h 49mAir France

Sat 2/812:00LGW - STL

2 stops17h 20mAir France

Deal found 11/6£641

Last-minute flights from St. Louis to London
Discover last-minute flight deals from St. Louis to London. Data last updated 13 June 2025 and is based on user searches.

Tue 17/607:30STL - LGW

2 stops25h 40mMultiple Airlines

Sun 29/613:05LGW - STL

2 stops35h 13mMultiple Airlines

Deal found 10/6£813

Wed 18/607:30STL - LHR

2 stops19h 05mUnited Airlines

Tue 12/814:05LHR - STL

2 stops26h 35mUnited Airlines

Deal found 11/6£869

Wed 18/613:30STL - LHR

1 stop11h 00mAir Canada

Tue 12/809:30LHR - STL

2 stops16h 15mAir Canada

Deal found 11/6£879

Wed 18/614:15STL - LHR

2 stops16h 55mDelta

Tue 12/812:25LHR - STL

2 stops15h 37mDelta

Deal found 11/6£888

Wed 18/607:30STL - LHR

2 stops18h 30mMultiple Airlines

Tue 12/807:40LHR - STL

2 stops30h 25mMultiple Airlines

Deal found 12/6£1,211

Wed 18/608:35STL - LHR

2 stops22h 50mAer Lingus

Tue 12/807:40LHR - STL

2 stops17h 41mAer Lingus

Deal found 13/6£1,250

Thu 19/615:42STL - LHR

2 stops19h 58mScandinavian Airlines

Sun 29/606:40LHR - STL

3 stops22h 56mScandinavian Airlines

Deal found 12/6£3,211

Sun 22/611:30STL - LHR

1 stop13h 15mLufthansa

Wed 2/706:30LHR - STL

1 stop13h 00mLufthansa

Deal found 12/6£1,219

Sun 22/608:10STL - LGW

2 stops32h 15mTurkish Airlines

Wed 2/714:00LGW - STL

2 stops38h 45mTurkish Airlines

Deal found 10/6£1,233

Sun 22/612:28STL - LHR

1 stop11h 57mBritish Airways

Mon 30/619:25LHR - STL

2 stops29h 46mBritish Airways

Deal found 13/6£1,233

Mon 23/607:30STL - LTN

3 stops33h 50mMultiple Airlines

Thu 26/608:45LTN - STL

2 stops16h 55mMultiple Airlines

Deal found 11/6£1,186

Mon 23/611:20STL - LCY

2 stops19h 10mMultiple Airlines

Thu 26/608:45LCY - STL

2 stops16h 46mMultiple Airlines

Deal found 11/6£2,114

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 13 June 2025.

Wed 16/711:24STL - LGW

1 stop16h 36mMultiple Airlines

Deal found 11/6£146

Mon 25/808:44STL - LHR

3 stops21h 11mMultiple Airlines

Deal found 10/6£232

Wed 16/719:29STL - STN

3 stops39h 56mMultiple Airlines

Deal found 11/6£302

Wed 23/713:16STL - LHR

1 stop12h 39mAmerican Airlines

Deal found 12/6£308

Wed 16/708:00STL - LHR

2 stops16h 30mAir Canada

Deal found 11/6£312

Tue 8/711:25STL - LHR

2 stops15h 55mUnited Airlines

Deal found 10/6£316

Thu 11/913:30STL - LHR

2 stops23h 00mScandinavian Airlines

Deal found 11/6£334

Wed 16/717:40STL - LTN

3 stops43h 45mMultiple Airlines

Deal found 11/6£334

Wed 23/710:30STL - LGW

2 stops17h 30mDelta

Deal found 10/6£344

Thu 11/916:02STL - LHR

1 stop12h 48mIberia

Deal found 12/6£345

Wed 16/719:29STL - SEN

3 stops42h 06mMultiple Airlines

Deal found 11/6£361

Thu 11/913:30STL - LHR

2 stops14h 45mDelta

Deal found 12/6£365

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 19/8

09:15-06:30

2 stops15h 15m

London Heathrow

Thu 28/8

06:50-15:21

2 stops14h 31m

£543

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 20/8

13:26-13:30

1 stop18h 04m

London Heathrow

Wed 27/8

06:15-16:45

2 stops16h 30m

£546

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 21/10

11:39-05:55

1 stop12h 16m

London Heathrow

Tue 28/10

13:30-14:55

1 stop30h 25m

£549

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Fri 12/9

08:44-19:30

3 stops28h 46m

London Gatwick

Sun 21/9

13:05-07:49

2 stops24h 44m

£550

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 23/9

13:53-20:45

2 stops24h 52m

London Heathrow

Wed 8/10

17:10-23:49

2 stops36h 39m

£550

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 14/7

17:27-12:45

1 stop13h 18m

London Heathrow

Mon 21/7

12:30-20:24

1 stop13h 54m

£551

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Tue 5/8

09:15-12:40

3 stops21h 25m

London Stansted

Tue 19/8

14:50-20:00

2 stops35h 10m

£552

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 7/9

09:15-06:30

2 stops15h 15m

London Heathrow

Sun 14/9

06:50-19:57

2 stops19h 07m

£553

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Wed 23/7

10:30-10:00

2 stops17h 30m

London Gatwick

Sat 2/8

12:00-23:20

2 stops17h 20m

£555

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 10/9

15:30-10:40

1 stop13h 10m

London Heathrow

Mon 22/9

18:30-15:44

2 stops27h 14m

£573

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 45 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 51 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 Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,946 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,790 reviews

Delta

8.0

Very Good

7,946 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?
Air Canada, at £543, was found to be the cheapest airline from St. Louis to London.Alternate airlines flying return to your destination include Delta and United Airlines. Users have found that Air Canada is 21% 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 American Airlines (£308), Air Canada (£312), and United Airlines (£316).
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

Croydon

Milton Keynes

Gatwick

Luton

Slough

Wembley

Crawley

Eastbourne

Ilford

Southend-on-Sea

Watford

Hayes

Ipswich

Winchester

Folkestone

Maidstone

Dartford

Guildford

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£492	Average£683	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
British Airways	Cheapest£493	Average£743	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£517	Average£804	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£524	Average£789	FlexibilityNo cancel fee	On-time75%	Search KLM flights
American Airlines	Cheapest£576	Average£985	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 £146

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 16/7. 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 October, booked 51 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 13 June 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 13 June 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 9 June 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 13 June 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 13 June 2025.

Read through reviews of airlines operating flights from St. Louis to London, such as Delta, KLM and Austrian 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

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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

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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 13 June 2025.