£259+ Cheap flights to St. Louis

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
29 Apr — 6 May1
1 adult
1 adult, Economy, 0 bags

Flights to St. Louis in 2026

Enter your travel dates to find the best prices.

Cheapest flights to St. Louis
Explore the most affordable flight options available to St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 30 March 2026.

Fri 24/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Fri 8/521:18
STL
-
LGW
2 stops30h 42m
Multiple Airlines
Deal found 25/3£580
Wed 22/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Sat 25/416:59
STL
-
LGW
1 stop35h 01m
Multiple Airlines
Deal found 28/3£586
Wed 22/418:05
LHR
-
STL
2 stops29h 07m
Finnair
Wed 29/418:11
STL
-
LHR
1 stop14h 14m
Finnair
Deal found 25/3£598
Wed 2/916:25
LHR
-
STL
Nonstop9h 05m
Multiple Airlines
Wed 23/915:33
STL
-
LHR
1 stop15h 17m
Multiple Airlines
Deal found 25/3£605
Wed 22/416:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 29/421:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 25/3£608
Fri 24/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Fri 1/520:23
STL
-
LGW
2 stops31h 37m
Multiple Airlines
Deal found 27/3£608
Wed 15/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Mon 8/617:27
STL
-
LGW
2 stops34h 33m
Multiple Airlines
Deal found 25/3£609
Mon 4/514:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Fri 8/521:18
STL
-
LGW
2 stops30h 42m
Multiple Airlines
Deal found 30/3£611
Wed 2/916:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 23/916:47
STL
-
LHR
1 stop10h 38m
British Airways
Deal found 29/3£615
Mon 21/910:05
LHR
-
STL
1 stop14h 10m
British Airways
Wed 30/921:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 29/3£616
Fri 8/514:00
LGW
-
STL
1 stop16h 21m
Multiple Airlines
Mon 11/517:27
STL
-
LGW
2 stops30h 53m
Multiple Airlines
Deal found 25/3£616
Wed 2/907:30
LHR
-
STL
2 stops22h 21m
Finnair
Wed 23/912:43
STL
-
LHR
1 stop19h 42m
Finnair
Deal found 25/3£619

Find flight deals to St. Louis

Find the latest flights to St. Louis in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 30 March 2026.

Return from

£580

One-way from

£259

Popular in

August

Cheapest in

January

Average price

£694

Good round-trip deal

£635 or less

Good one-way deal

£1,845 or less
24/4-8/5
  • 24/4-8/5
  • 3 total stops
  • 46h 01m total
  • London to St. Louis
22/4
  • 22/4
  • 1 total stop
  • 15h 19m total
  • London to St. Louis
Highest demand for flights based on searches. 8% potential increase in price (£65 potential increase over avg. return price).
Cheapest flight prices on average. 1% potential price decrease (£12 potential savings vs. average return price).
Average for return flights in March 2026
Price to beat on a round-trip flight from London to Lambert-St Louis.
Price to beat on a one-way flight from London to Lambert-St Louis.

Cheapflights Fare Finder

 
Locate flights to St. Louis that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 30 March 2026.
Use the filters below to find and compare flights to St. Louis that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

09:55-20:31

2 stops16h 36m

Lambert-St Louis

Wed 23/9

19:05-14:35

2 stops13h 30m

£639

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 27/4

09:55-20:44

2 stops16h 49m

Lambert-St Louis

Mon 4/5

18:50-13:15

1 stop12h 25m

£653

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 12/5

09:55-21:09

2 stops17h 14m

Lambert-St Louis

Tue 19/5

06:45-07:10

1 stop18h 25m

£655

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 11/5

09:55-21:09

2 stops17h 14m

Lambert-St Louis

Mon 18/5

06:00-07:15

1 stop19h 15m

£657

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 10/9

09:45-20:03

1 stop16h 18m

Lambert-St Louis

Mon 14/9

12:47-06:55

1 stop12h 08m

£666

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 2/5

08:40-20:44

2 stops18h 04m

Lambert-St Louis

Sun 10/5

19:01-14:35

2 stops13h 34m

£667

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 30/4

12:15-16:00

1 stop33h 45m

Lambert-St Louis

Thu 7/5

13:29-06:50

1 stop11h 21m

£679
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

09:55-20:31

2 stops16h 36m

Lambert-St Louis

Fri 18/9

14:18-07:10

1 stop10h 52m

£683

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 10/5

10:45-21:09

1 stop16h 24m

Lambert-St Louis

Sun 17/5

19:01-14:35

2 stops13h 34m

£683

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 30/4

06:30-16:42

2 stops16h 12m

Lambert-St Louis

Thu 7/5

10:19-08:50

2 stops16h 31m

£683

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight to St. Louis

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

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

Use this chart to determine the optimal time to book a return flight from London to St. Louis. Price data was last updated on 13 March 2026.

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

How long is the flight to St. Louis?

On average, a flight from London to St. Louis takes 14 hours 15 minutes. Flights to St. Louis from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

What are the cheapest airlines that fly to St. Louis?

The cheapest airlines flying from London to St. Louis are American Airlines, United Airlines and British Airways.

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

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

If weather is an important factor for your trip to St. Louis, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to 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 an airline for your flight to St. Louis. Reviews last updated 30 March 2026.
Read through reviews of airlines serving the United States, such as Finnair,Virgin Atlantic, andUnited Airlines. 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.

Overall

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

Overall

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

Overall

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

Overall

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

Overall

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

Overall

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Reviews

1 / 20
6.0
Good

Firuz,Feb 2026

FRA - HEL

Positive: Simple and quick check-in. It was refreshingly easy and polite check-in and boarding staff. Negative: We were delayed, and there was no communication. I am surprised that with an airline like Finnair, you do not get any snacks on a 2.5h flight. The flights are not as cheap as Ryanair, so a bit more service would be appreciated. The crew did not specify which drink was free and which was available for payment, as there was no menu at my seat.

FAQs about flying to St. Louis

St. Louis climate

St Louis has moderate, seasonal weather, but storms can occur at any time of the year. July and August are the hottest and most humid months of the year, and January and February are cold, usually with snow. Winter temperatures range from below 0 to 13 degrees C, while summers have daily temperatures of between 14 to 32 degrees C.

Getting around St. Louis

The local transport connects the central regions and is a great way to travel throughout the city. It’s possible to access the majority of St. Louis tourist attractions via the public transport, so a car isn’t necessary. There are shuttle buses that will transport travellers from some attractions to the nearest station. Travellers can pick up a shuttle service map at any of the stations, or at first attraction. Bus services are part of the same network, but extend throughout St. Louis counties.

Renting a car is also an option. St. Louis is a very easy city to navigate and parking is abundant throughout the city. However, if you plan to drive to the suburbs, the navigation might become a little tricky. Make sure to check with your hotel or a local before hitting the motorway in your rental car.

Taxi stands are located at most major hotels around the city and at common tourist attractions. Cabs can also be reserved ahead of time.

Getting from the Airport to the City

Lambert–St. Louis International Airport (STL) is located around 10 miles (16 km) northwest of downtown St. Louis.

What is good to know if travelling to St. Louis?

  • Celebrate Independence Day in style with a flight to St. Louis. Grab a blanket and a couple of chairs and head down to the riverfront for 4th of July. Grab a spot underneath the Arch and enjoy the spectacle. From people watching, to concerts and outdoor vendors and markets, there is much to do to celebrate America’s birthday. And of course, an amazing fireworks display happens on the riverfront.
  • St. Louis’ Soulard Market Place is home to the best outdoor markets in the city, and also one of the best Mardi Gras parties in the Midwest.
  • The Butterfly Garden in St. Louis’ suburb, Chesterfield, is a must-see for travellers of any age. Located in Faust Park about 30 minutes west of St. Louis City, the Butterfly Garden is a delight for everyone.
  • You don’t have to be a baseball fan to appreciate Busch Stadium. Take a tour of the Stadium or take in a game.
  • Beer lovers know St. Louis as the home of Anheuser-Busch. Brewed right in the city centre, the Anheuser-Busch Brewery offers daily tours, and of course, beer tastings. 

St. Louis airport overview

Lambert-St Louis International Airport, or Lamberts as it’s affectionately known, is located 17km (10 miles) northwest of the city of St Louis, Missouri, and is in close proximity to connecting interstate highways. With four long runways and more than 12 million passengers per year, Lamberts is the state’s busiest airport; nonstop flights to Lambert-St Louis International Airport arrive from 88 domestic and international hubs.

Lambert-St Louis has a certain historical pedigree, too. It served as a balloon-launching base in the 19th century and was later visited by the Wright Brothers on one of their early flights. In 1910, Theodore Roosevelt took a flight from here, becoming the first US President to fly, and a few years later the first experimental parachute jump took place over the airfield.

A new construction project – launched in spring 2011 – is set to improve passenger services, boost airport operations and offer good views of the establishment. Terminal 1 is already an architectural spectacle, with exciting LED lighting that may be viewed from the interior and exterior of the building, as well as new flooring, ticket counters, signs, security checkpoints and an atrium, all of which have resulted in a completely new and attractive look for Lambert-St Louis International Airport.

  • What airport do you fly into for flights to St. Louis?

    If you book a flight to St. Louis, you will be flying into Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • Can I find cheaper flights to St. Louis if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to St. Louis on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to St. Louis?

    Based on reviews from Cheapflights users, American Airlines is rated the highest out of the airlines that fly to St. Louis.

  • What is the cheapest airport to fly to in St. Louis?

    Lambert-St Louis is currently the cheapest airport to fly to in St. Louis. One-way flights to Lambert-St Louis typically cost £87, while return flights cost around £213.

  • How much is a return flight to St. Louis?

    A return flight to St. Louis will typically cost around £406, however they can be found for as little as £213.

  • Where does the fastest flight to St. Louis depart from?

    For those looking to save time traveling to St. Louis, London offers the quickest one-way flight (9 hours 5 minutes).

  • Does Lambert-St Louis have car hire?

    Yes. Those touching down at Lambert-St Louis can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Lambert-St Louis?

    Yes. Lambert-St Louis has hotels nearby for those requiring accommodations. 3-bedroom building in serene Saint Ann with WiFi, AC is the closest property to Lambert-St Louis (0.0 mi away from Lambert-St Louis).

See more FAQs

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.

Find the best flight deals to St. Louis

Some of the lowest fares we’ve come across for flights to St. Louis.

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 to St. Louis?

When you search for this flight to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

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

Cheapflights simply makes it quick and affordable to book flights to 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 to St. Louis with no change fees?

Yes, we can. To see specific flights to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can track prices for flights to St. Louis and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.