IAD to STL (Washington to St. Louis) Flights

Last Minute Flights from IAD to STL

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
IADSt. LouisMay 4 to May 7$300
*Prices include taxes and fees

Cheapest IAD to STL Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
IADSt. LouisMay 25 to May 29$188
IADSt. LouisMay 28 to May 29$189
IADSt. LouisMay 28 to May 29$199
IADSt. LouisMay 24 to May 28$230
*Prices include taxes and fees
IAD to STL Flight Details
Origin airport
Washington Dulles Intl.
Origin airport IATA code
IAD
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Distance
694 mi

Frequently asked questions

What airlines fly direct from Washington Dulles Intl. Airport (IAD) to Lambert Field?
If you’d like to jet nonstop from Washington Dulles Intl. Airport (IAD) to STL, United Airlines (UA) is a great choice. It lists 60 flights every month between these destinations.
How many flights are there from IAD to STL?
About 54 flights operate daily between Washington, DC (IAD-Washington Dulles Intl.) and St. Louis, MO (STL-Lambert-St. Louis Intl.). Buckle up because your plane to St. Louis is ready to take flight.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The flight duration is roughly 6 hours and 26 minutes from Washington, DC (IAD-Washington Dulles Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) — hopefully long enough to enjoy a few chapters of your favorite book!
What is the flight distance from Washington, DC (IAD-Washington Dulles Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The short-haul trip from Chantilly to St. Louis is a quick 700 miles (1,100 1). Don’t get too relaxed though — you’ll be landing at St. Louis, MO (STL-Lambert-St. Louis Intl.) not all that long after taking off.
How many morning flights are there from IAD to STL?
With 168 morning flights per week from IAD to STL to select from, you’ll be leaping out of bed and jetting off in no time at all.

  • You can take off at 6:00AM if you grab a seat with United Airlines (UA). It has 63 weekly flights from IAD to STL.
  • Another option is Delta Air Lines. This carrier has 47 early flights per week. 6:00AM is the earliest to depart.
  • Fly before noon with American Airlines (AA) and you’ll have 18 flights each week to take your pick of. 5:02AM is the first of the day from IAD to STL.

How many afternoon flights are there from IAD to STL?
With 215 afternoon and evening flights from IAD to STL per week, you can forget all about waking up at the crack of dawn.

  • Grab an airfare with United Airlines (UA), which has 105 flights every week that jet off after noon. 12:35PM is the earliest of those departures.
  • Delta Air Lines (DL) offers 45 afternoon and evening flights a week. The first leaves at 12:07PM.
  • Otherwise, fasten your seat belt with American Airlines (AA). This airline has 32 flights per week after midday, with the earliest leaving at 12:00PM.

What is the earliest departure time out of Chantilly to St. Louis?
Head out from IAD at 5:02AM and hit the tarmac at STL at 12:22AM. This is the earliest departure you can book on this route.
What is the latest departure time out of Chantilly to St. Louis?
Book a seat on the 10:23PM flight out of IAD, touching down at STL at 9:49PM, and give yourself time to finish up those last-minute vacation preparations. This is the latest flight you can get on this route.
What is the average price from Chantilly to St. Louis?
Round-trip fares for this route start from around $188. When you’re ready to lock in your trip, we’re ready to help you score the best price around. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Washington to St. Louis Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Washington to St. Louis to attend your cousin’s wedding, to pitch a business idea to your boss, or simply treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find our cheapest flights from IAD to STL, we’ve got you covered here at Flights.com.

We present you with some of the most affordable deals on airfare, so stop that Google flights search. We want you to spend less on your flight from Washington to St. Louis, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.