Cheap Flights from Wilmington (ILG) to St. Louis (STL)

Popular airlines from Wilmington, DE (ILG-New Castle) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Wilmington to St. Louis (ILG-STL)

Prices were available within the past 7 days and start at for one-way flights and $363 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$363 Roundtrip, found 3 days ago
$363
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $363 found 3 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$368 Roundtrip, found 3 days ago
$368
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $368 found 3 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$378 Roundtrip, found 3 days ago
$378
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $378 found 3 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$383 Roundtrip, found 3 days ago
$383
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $383 found 3 days ago
American Airlines
Wed, Dec 24 - Sat, Jan 3
ILG
Wilmington
STL
St. Louis
$398 Roundtrip, found 2 days ago
$398
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Dec 24 from Wilmington to St. Louis, returning Sat, Jan 3, priced at $398 found 2 days ago
American Airlines
Sun, Nov 2 - Thu, Nov 6
ILG
Wilmington
STL
St. Louis
$406 Roundtrip, found 2 days ago
$406
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, Nov 2 from Wilmington to St. Louis, returning Thu, Nov 6, priced at $406 found 2 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$408 Roundtrip, found 3 days ago
$408
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $408 found 3 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$415 Roundtrip, found 3 days ago
$415
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $415 found 3 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$422 Roundtrip, found 3 days ago
$422
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $422 found 3 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$430 Roundtrip, found 3 days ago
$430
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $430 found 3 days ago
American Airlines
Mon, Dec 15 - Thu, Jan 1
ILG
Wilmington
STL
St. Louis
$432 Roundtrip, found 2 days ago
$432
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 15 from Wilmington to St. Louis, returning Thu, Jan 1, priced at $432 found 2 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$432 Roundtrip, found 3 days ago
$432
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $432 found 3 days ago
American Airlines
Thu, Oct 30 - Thu, Nov 13
ILG
Wilmington
STL
St. Louis
$437 Roundtrip, found 2 days ago
$437
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Oct 30 from Wilmington to St. Louis, returning Thu, Nov 13, priced at $437 found 2 days ago
American Airlines
Thu, Dec 25 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$437 Roundtrip, found 3 days ago
$437
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 25 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $437 found 3 days ago
American Airlines
Fri, Oct 31 - Sat, Nov 1
ILG
Wilmington
STL
St. Louis
$441 Roundtrip, found 14 hours ago
$441
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Fri, Oct 31 from Wilmington to St. Louis, returning Sat, Nov 1, priced at $441 found 14 hours ago
American Airlines
Thu, Jan 1 - Tue, Jan 6
ILG
Wilmington
STL
St. Louis
$442 Roundtrip, found 3 days ago
$442
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jan 1 from Wilmington to St. Louis, returning Tue, Jan 6, priced at $442 found 3 days ago
American Airlines
Mon, Nov 24 - Wed, Dec 10
ILG
Wilmington
STL
St. Louis
$446 Roundtrip, found 19 hours ago
$446
Roundtrip
found 19 hours ago
Select American Airlines flight, departing Mon, Nov 24 from Wilmington to St. Louis, returning Wed, Dec 10, priced at $446 found 19 hours ago
American Airlines
Sat, Dec 13 - Thu, Jan 1
ILG
Wilmington
STL
St. Louis
$447 Roundtrip, found 2 days ago
$447
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Dec 13 from Wilmington to St. Louis, returning Thu, Jan 1, priced at $447 found 2 days ago
American Airlines
Thu, Dec 18 - Wed, Dec 31
ILG
Wilmington
STL
St. Louis
$447 Roundtrip, found 3 days ago
$447
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Dec 18 from Wilmington to St. Louis, returning Wed, Dec 31, priced at $447 found 3 days ago
American Airlines
Mon, Dec 22 - Sat, Jan 10
ILG
Wilmington
STL
St. Louis
$452 Roundtrip, found 2 days ago
$452
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 22 from Wilmington to St. Louis, returning Sat, Jan 10, priced at $452 found 2 days ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $460
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $460

Frequently asked questions

How much does a flight from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight or cheap return flight from $363 from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL)?
Flying in December is a great way to save, as it's the cheapest month for flights between ILG and STL. You'll usually find the lowest prices during off-peak months.
Which airlines fly direct from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL)?
Although Wilmington, DE (ILG-New Castle) doesn't have any direct flights to Lambert-St. Louis Intl. Airport (STL), other airports have nonstop routes. Flying from Philadelphia Intl. Airport (PHL) will get you to St. Louis without any layovers.
What is the cheapest airline that flies from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from ILG to STL, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL)?
Direct flights from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ILG to STL?
Typically you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can vary based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL)?
Book a flight from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations and delays. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from ILG to STL are typically more expensive. For the best rates, start looking for flights as early as possible. That said, if your travel plans are flexible, it's possible to land a cheap ticket just before your departure.
Is it cheaper to book an ILG to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking an ILG to STL flight and hotel package with Expedia could lead to significant savings. Better yet, managing everything in one place takes the hassle out of travel planning. Just secure your flights and select from our extensive range of stays, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Wilmington, DE (ILG-New Castle) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your ILG to STL flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

Travel information

Travel information

Origin airport
New Castle
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines
Roundtrip price
$362
Distance
792 mi

Book with confidence

Book with confidence

Wilmington to St. Louis Flights

The cheapest times to fly from Wilmington to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Wilmington to St. Louis are during the month of December. You can find some of the cheapest flights from Wilmington to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Wilmington to St. Louis

Sunday is one of the best days to book for cheap flights from Wilmington to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Wilmington to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Wilmington to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Wilmington to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Wilmington to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Wilmington to St. Louis Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.