STL to IAD (St. Louis to Washington) Flights

Last Minute Flights from STL to IAD

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

OriginDestinationTravel DatesFlights From*
STLChantillyMarch 14 to March 15$360
*Prices include taxes and fees

Cheapest STL to IAD Flights

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

OriginDestinationTravel DatesFlights From*
STLChantillyApril 25 to May 2$180
STLChantillyApril 28 to April 30$214
STLChantillyApril 29 to May 7$218
STLChantillyApril 7 to April 8$237
STLChantillyApril 27 to April 30$241
*Prices include taxes and fees
STL to IAD Flight Details
Origin airport
Lambert-St. Louis Intl.
Origin airport IATA code
STL
Destination airport
Washington Dulles Intl.
Destination airport IATA code
IAD
Distance
694 mi

Frequently asked questions

What airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Washington Dulles Intl. Airport (IAD)?
Get comfy and make the most of the hassle-free ride from Lambert Field to IAD with United Airlines (UA). Advertising 60 nonstop monthly flights on this route, this airline will get your adventure off to a flying start.
How many flights are there from STL to IAD?
There are about 46 flights a day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Washington, DC (IAD-Washington Dulles Intl.), so you have ample opportunities to get to Chantilly. Just pick a date and time that matches your plans and lock in your fare.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The flight duration is approximately 6 hours and 1 minute from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Washington, DC (IAD-Washington Dulles Intl.) — just long enough to enjoy a few chapters of your favorite book!
What is the flight distance from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The short-haul trip from St. Louis to Chantilly is a mere 700 miles (1,100 1). Don't get too comfy though — you'll be stepping onto the tarmac at Washington, DC (IAD-Washington Dulles Intl.) not long after you take off!
How many morning flights are there from STL to IAD?
Set your alarm and prepare to take to the skies on one of the 186 morning flights from STL to IAD available every week.

  • Delta Air Lines (DL) offers 59 weekly flights leaving before noon. The earliest one you can catch is 5:36AM.
  • United Airlines (UA) is another great option. It operates 53 morning flights, with the earliest departure time being 6:00AM.
  • Book a ticket with American Airlines (AA) and you'll have some 48 morning flights to choose from. The earliest departure time is 5:00AM.

How many afternoon flights are there from STL to IAD?
Soar through the skies aboard one of the 136 afternoon and evening flights from STL to IAD per week.

  • Think about locking in your fare with Delta Air Lines (DL). It has 48 flights each week that depart after midday. The earliest is 12:00PM.
  • If you'd prefer to lock in a seat with United Airlines (UA), browse the 44 weekly afternoon and evening flights that depart STL from 12:20PM onward.
  • Otherwise you can reserve a flight from 1:01PM onward with American Airlines (AA). This carrier has 29 afternoon and evening flights a week.

What is the earliest departure time out of St. Louis to Chantilly?
The earliest flight departs STL at 5:00AM and arrives at 10:23PM at IAD. Make sure you give yourself ample time in the morning to get to your gate.
What is the latest departure time out of St. Louis to Chantilly?
The last flight jets out from STL at 7:20PM and touches down at IAD at 3:27PM. You'll have lots of time to get ready for this journey.
What is the average price from St. Louis to Chantilly?
Round-trip journeys from STL to IAD begin from around $180. Hot deals don't stick around forever, so get set to click "book" when you spy a bargain. 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.

St. Louis to Washington Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from St. Louis to Washington 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 STL to IAD, 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 St. Louis to Washington, 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.

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