£117+ Cheap flights from St. Louis

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — LHR
16 Nov — 23 Nov1
1 adult
1 adult, Economy

What to know about flights from St. Louis

Discover essential information about flights departing from St. Louis, including flight schedules, destinations, airlines operating at the St. Louis airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 17 October 2025.

Cheapest airline

British Airways

Good round-trip deal

£315 or less

Good one-way deal

£74 or less
On average, British Airways currently has the cheapest one-way flight from Lambert-St Louis (avg. price of £735).
Price to beat on a round-trip flight from Lambert-St Louis.
Price to beat on a one-way flight from Lambert-St Louis.

Find flights from St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis
Explore the most affordable flight options available from St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 17 October 2025.

Sun 8/306:30STL - LIN
2 stops23h 25mUnited Airlines
Tue 17/314:50LIN - STL
2 stops30h 39mUnited Airlines
Deal found 14/10£377
Mon 9/209:00STL - LIN
2 stops19h 15mDelta
Wed 18/206:30LIN - STL
2 stops21h 09mDelta
Deal found 16/10£380
Sun 8/311:25STL - LIN
2 stops18h 30mUnited Airlines
Thu 19/306:00LIN - STL
2 stops22h 49mUnited Airlines
Deal found 14/10£380
Sat 7/216:49STL - LIN
2 stops36h 06mUnited Airlines
Tue 17/206:15LIN - STL
2 stops21h 45mUnited Airlines
Deal found 16/10£384
Sun 8/316:50STL - LIN
1 stop15h 20mUnited Airlines
Wed 18/306:10LIN - STL
2 stops21h 40mUnited Airlines
Deal found 14/10£386
Mon 9/218:44STL - LIN
2 stops16h 01mBritish Airways
Wed 18/207:35LIN - STL
2 stops17h 21mBritish Airways
Deal found 15/10£386
Fri 6/211:20STL - LIN
2 stops17h 35mUnited Airlines
Thu 19/214:50LIN - STL
2 stops31h 39mUnited Airlines
Deal found 16/10£389
Fri 6/211:20STL - LIN
2 stops17h 35mUnited Airlines
Tue 17/206:15LIN - STL
2 stops21h 45mUnited Airlines
Deal found 16/10£392
Sun 8/215:11STL - LIN
2 stops13h 44mUnited Airlines
Mon 16/206:15LIN - STL
2 stops21h 45mUnited Airlines
Deal found 16/10£393
Sat 7/216:49STL - LIN
2 stops36h 06mUnited Airlines
Mon 16/214:50LIN - STL
2 stops35h 29mUnited Airlines
Deal found 16/10£398
Sat 7/216:05STL - LIN
2 stops39h 05mUnited Airlines
Sun 15/214:50LIN - STL
2 stops31h 39mUnited Airlines
Deal found 16/10£399
Wed 3/1213:00STL - LIN
2 stops18h 05mUnited Airlines
Sun 7/1206:15LIN - STL
2 stops16h 25mUnited Airlines
Deal found 14/10£401

Find flights from St. Louis within your budget

 
Find flights departing from St. Louis that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 17 October 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Tue 10/3

08:20-11:55

2 stops21h 35m

Milan Linate

Tue 17/3

14:50-15:29

2 stops30h 39m

£377

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Wed 11/3

08:00-11:55

2 stops21h 55m

Milan Linate

Wed 18/3

14:55-15:29

2 stops30h 34m

£377

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Mon 9/2

11:20-11:55

2 stops17h 35m

Milan Linate

Thu 19/2

14:50-15:29

2 stops31h 39m

£377

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Wed 11/3

08:25-11:55

2 stops21h 30m

Milan Linate

Tue 17/3

14:50-15:29

2 stops30h 39m

£377

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Sun 8/3

06:30-11:55

2 stops23h 25m

Milan Linate

Tue 17/3

14:50-15:29

2 stops30h 39m

£377

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Sun 8/2

12:00-11:15

2 stops16h 15m

Milan Linate

Fri 20/2

06:30-20:39

2 stops21h 09m

£380

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Mon 9/2

09:00-11:15

2 stops19h 15m

Milan Linate

Wed 18/2

06:30-20:39

2 stops21h 09m

£380

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Wed 11/2

10:00-11:15

2 stops18h 15m

Milan Linate

Fri 20/2

06:30-20:39

2 stops21h 09m

£380

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Wed 11/2

10:00-11:15

2 stops18h 15m

Milan Linate

Wed 18/2

06:30-16:01

2 stops16h 31m

£380

St. LouisMilan

STL - LIN

STLLIN

Lambert-St Louis

Tue 10/2

09:00-11:15

2 stops19h 15m

Milan Linate

Tue 17/2

10:55-20:39

2 stops16h 44m

£380

Flights are sorted by cheapest return flights first.

Deals found on 16/10

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis

Have a flexible travel schedule? Discover the best time to fly 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.

Travel insights for flights from St. Louis

Get recent, data-driven insights about flights from St. Louis including ideal travel times, pricing trends, and more.

When is the best time to book a flight from St. Louis?

Use this chart to determine the optimal time to book a return flight from St. Louis to Heathrow. Price data was last updated on 10 October 2025.

Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis. 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?

Currently, September is the cheapest month in which you can book a flight from St. Louis (average of £395). Flying from St. Louis in June will prove the most costly (average of £745). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Airline reviews for flights from St. Louis

Get insights into the airlines that provide service from St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from St. Louis. In the last 7 days, Cheapflights users made a total of 858,174 searches.
Read through reviews of airlines serving St. Louis, such as KLM, Virgin Atlantic, andAir Canada. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Comfort

7.6

Entertainment

7.1

Overall

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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Direct flights from Missouri

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Related info for your journey

Access useful and relevant information related to your journey from St. Louis. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 17 October 2025.
  • What are the most popular destinations to fly to from St. Louis?

    This month, the top selected destinations from St. Louis are Denver, Boston, Atlanta. Throughout the year, Denver, Cancún, Atlanta are some of the top choices made by users flying from St. Louis.

  • What is the cheapest flight from St. Louis to anywhere?

    Users have flown out of St. Louis for as low as £71 to Detroit Metropolitan Wayne County Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for £456 to fly from St. Louis.

  • What are the cheapest airlines flying from St. Louis to anywhere?

    Over the past few days, we've found that Virgin Atlantic, British Airways, and Air Canada have the cheapest prices from St. Louis. Virgin Atlantic flights from St. Louis to London Heathrow (£376), British Airways flights from St. Louis to London Heathrow (£431), and Air Canada flights from St. Louis to London Heathrow (£435).

  • What is the cheapest premium economy flight from St. Louis?

    Here are some of the cheapest offers we have found for the cheapest premium economy flights from St. Louis.
    Lambert-St Louis to Washington, D.C. Dulles Intl Airport from £1,271
    Lambert-St Louis to Frankfurt am Main Airport from £1,758
    Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl Airport from £2,008
    Lambert-St Louis to Newark Airport from £2,167

  • What is the cheapest first class flight from St. Louis?

    If you’re looking for a cheap first-class flight from St. Louis, consider Chicago. Prices start at £362 so you can fly first-class even on a budget.

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

    At the present moment the cheapest month to fly from St. Louis is currently September; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from St. Louis?

    Check out the cheapest flights from St. Louis to embark to:
    Travel from St. Louis to London from £438 round trip

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

    Deals for flights from St. Louis are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

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

    Cheapflights simply makes it quick and affordable to book flights from St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

    Users can book flights with no change fees policies with our dedicated filters. Book flights from St. Louis flexibly with Cheapflights today.

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

    Not ready to book yet? You can track prices for flights from St. Louis on Cheapflights with our Price Alerts feature and get notified when better prices are available.

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Deals for flights from St. Louis are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from St. Louis flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from St. Louis on Cheapflights with our Price Alerts feature and get notified when better prices are available.

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