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Flights from Washington D.C. to St. Louis

Cheap flight deals from Washington D.C. to St. Louis

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from Washington D.C. to St. Louis?

We monitor flight fares to help you find the best deals effortlessly

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  • 6 13
  • 13 20
  • 20 27

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Washington D.C. (WAS) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Washington D.C. to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Washington D.C. (WAS) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around AED 1,391.

  • How long does it take to fly from Washington D.C. (WAS) to St. Louis (STL)?

    It takes about 2 hours 28 minutes to fly from Washington D.C. (WAS) to St. Louis (STL).

  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20 km, by taxi about 40 minutes.

  • What time does the earliest flight from Washington D.C. to St. Louis depart?

    The earliest flight departs from Washington D.C. (IAD) at 08:15 and arrives in St. Louis (STL) at 09:22.

  • What time does the latest flight from Washington D.C. to St. Louis depart?

    The latest flight departs from Washington D.C. (IAD) at 18:07 and arrives in St. Louis (STL) at 19:26.

  • What are the most popular airlines that fly from Washington D.C. (WAS) to St. Louis (STL)?

    Airlines with flights from Washington D.C. (WAS) to St. Louis (STL): Southwest Airlines, American Airlines, United Airlines, Copa Airlines, avianca, Lufthansa and Brussels Airlines.

  • What's the most popular airline for non-stop flights from Washington D.C. (WAS) to St. Louis (STL)?

    Southwest Airlines operates 1 non-stop flights from Washington D.C. (WAS) to St. Louis (STL).

  • How many airports are there in St. Louis (STL)?

    There are 1 airport(s) near St. Louis (STL): St. Louis Lambert International Airport.

How to find a cheap flight from Washington D.C. to St. Louis

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Washington D.C. to St. Louis. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest Washington D.C. to St. Louis ticket.
Tap "Date" on flight search bar to scan through the calender for Washington D.C. to St. Louis airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Wed, May 7 at AED 320 for one-way flights.
2
Compare cheap Washington D.C. to St. Louis flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Washington D.C. to St. Louis. The cheapest airline operating is Southwest Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your Washington D.C. to St. Louis route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap Washington D.C. to St. Louis flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from Washington D.C. to St. Louis to get exclusive deals for you.

Flight Info | Washington D.C. to St. Louis

Cheapest one-way flight price AED 310
Cheapest return ticket price AED 610
Off-season for travel March
Peak season for travel January
Flight distance 1,139.76 km
Average flight time 2 hours 28 minutes
Popular airline Delta Air Lines

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