£358 Cheap Flights to Southwest Illinois

View £358 flight on Tue, 8 Sept 2026Opens in a new window

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Cheap round-trip flights to Southwest Illinois

Prices were available within the past 7 days and start at £358 for one-way flights and £546 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, 18 Mar - Wed, 25 Mar
LHR
London
STL
St. Louis
£546 Return, found 1 day ago
£546
Return
found 1 day ago
Select American Airlines flight, departing Wed, 18 Mar from London to St. Louis, returning Wed, 25 Mar, priced at £546 found 1 day ago
British Airways
Mon, 9 Mar - Mon, 23 Mar
LHR
London
STL
St. Louis
£546 Return, found 21 hours ago
£546
Return
found 21 hours ago
Select British Airways flight, departing Mon, 9 Mar from London to St. Louis, returning Mon, 23 Mar, priced at £546 found 21 hours ago
KLM
Wed, 18 Mar - Sun, 29 Mar
LHR
London
STL
St. Louis
£550 Return, found 4 days ago
£550
Return
found 4 days ago
Select KLM flight, departing Wed, 18 Mar from London to St. Louis, returning Sun, 29 Mar, priced at £550 found 4 days ago
Finnair
Wed, 18 Mar - Wed, 25 Mar
LHR
London
STL
St. Louis
£552 Return, found 1 day ago
£552
Return
found 1 day ago
Select Finnair flight, departing Wed, 18 Mar from London to St. Louis, returning Wed, 25 Mar, priced at £552 found 1 day ago
Air France
Mon, 9 Mar - Mon, 23 Mar
LHR
London
STL
St. Louis
£555 Return, found 7 hours ago
£555
Return
found 7 hours ago
Select Air France flight, departing Mon, 9 Mar from London to St. Louis, returning Mon, 23 Mar, priced at £555 found 7 hours ago

Expedia flights to Southwest Illinois

Searching for cheap flights to Southwest Illinois? No travel company presents more choices than Expedia if you're looking to compare flights to Southwest Illinois. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Illinois. Expedia provides the cheapest flights to many destinations in Illinois and you may find even greater savings if you combine your flight with a hotel stay in Southwest Illinois.

Expedia is the largest online travel agency which means that Expedia have access to cheap flights. So make sure you check Expedia regularly for these bargain flights because the cheapest airline tickets sell out fast.

Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Southwest Illinois for that period and let you choose your preferred time and airline. If you need additional assistance, Expedia Customer Service representatives are available from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends. Our capable staff will be able to help you with any questions regarding your Southwest Illinois flight, or other booking questions that may arise. When you book flights with Expedia you can rest assured that you have booked the best flight at the lowest price.

Frequently asked questions

How do I find cheap flights to Southwest Illinois that have flexible change policies?
By using our neat "No change fee" filter, that's how. Just enter your travel details, click "Search," then tick the checkbox directly underneath the "Flexible change policies" heading (top left-hand side of your screen). Expedia makes it a cinch to find flexible and affordable tickets to Southwest Illinois.
Which airlines fly to Southwest Illinois?
When you're ready to reserve your ticket to or near Southwest Illinois, these popular carriers are waiting to welcome you on board:

  • Southwest Airlines - 2,214 flights to or near Southwest Illinois each month, including 2,214 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • American Airlines - 971 flights to or near Southwest Illinois each month, including 789 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • Delta Air Lines - 728 flights to or near Southwest Illinois each month, including 650 flights to Lambert-St. Louis Intl. Airport (STL) per month.

How can I find cheap tickets to Southwest Illinois?
In the last seven days, £546 was the best price for a flight to Southwest Illinois. If you'd love to save even more, book in advance and be flexible with your travel dates. Search for your flight to Southwest Illinois, then see prices for similar time frames by clicking on the "flexible dates" link above.
How much is a flight to Southwest Illinois?
In the last seven days, round-trip tickets to Southwest Illinois sold for as little as £546 and reached a maximum price of £555. For one-way trips departing from London (LGW), the lowest amount paid during this time was only £358.
What are the most popular airports to fly into in Southwest Illinois?
Choosing your airport comes down to factors including your airline, budget and where you plan to explore. These are your choices in Southwest Illinois:

  • Lambert-St. Louis Intl. Airport (STL) - 4,902 flights per month.
  • Evansville Regional Airport (EVV) - 277 flights per month.

When is the cheapest time to fly to Southwest Illinois?
Consider jetting off earlier in the week to book the best airfare to Southwest Illinois. Tuesday is usually the most affordable day to fly, with Monday right behind it. Saturday often has the most expensive ticket prices. This is because a lot of people choose to begin their trip on a weekend.
How much is a plane ticket to Southwest Illinois?
In the last seven days, plane tickets to Southwest Illinois ranged between £546 and £555. Prices depend on multiple things, particularly the time of departure, carrier, cabin class and when the fare is booked.
What months are the cheapest to book a flight to Southwest Illinois?
The most affordable month to score a terrific deal to Southwest Illinois is February, while the priciest month is December. Avoid this month if you're looking to save money.
Flights to Southwest Illinois information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
£546

Trending flights to Southwest Illinois

Prices were available within the past 7 days and start at £358 for one-way flights and £546 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, 9 Mar - Mon, 23 Mar
LHR
London
STL
St. Louis
£546 Return, found 21 hours ago
£546
Return
found 21 hours ago
Select British Airways flight, departing Mon, 9 Mar from London to St. Louis, returning Mon, 23 Mar, priced at £546 found 21 hours ago

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