STL to IAD (St. Louis to Washington) Flights

Last Minute Flights from STL to IAD

Best airfare and ticket deals for STL to IAD flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
STLChantillyMarch 31 to April 13$475
*Prices include taxes and fees

Cheapest STL to IAD Flights

Best airfare and ticket deals for STL to IAD flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
STLChantillyMay 8 to May 11$176
STLChantillyApril 24 to April 28$183
STLChantillyApril 23 to April 24$205
STLChantillyApril 23 to April 24$301
*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

Which airlines with flights from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.) allow free cancellation due to COVID-19?
To find airlines that offer flexible COVID-19 related changes, take advantage of our convenient filter tool. Begin by entering your preferred flight details. Then, once all the available flights appear, check the “No change fee” box underneath the “Flexible change policies” subheading on the left. Familiarize yourself with the air carrier’s rules and regulations before reserving your St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to IAD fare.
What airlines fly direct from STL to IAD?
Enjoy a stress-free trip from takeoff to landing aboard United Airlines (UA). This leading carrier offers 95 nonstop flights on the route from STL to IAD every month.
How many flights are there from STL to IAD?
About 3 each day. If you’re in a big rush to visit Loudoun County, see if you can score an awesome last-minute deal from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.) and then reserve it fast!
How long does it take to fly from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.)?
You’ll just have enough time for a quick doze on this trip of 1 hour and 59 minutes. St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.) is classified as a short-haul flight.
What is the flight distance from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.)?
It’s a breezy 700 miles (1100 km) from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.), making it a short-haul journey. Secure a window seat and stare out at the bird’s-eye view of Loudoun County as you fly in.
How many morning flights are there from STL to IAD?
Every week, 8 flights set off from STL to IAD before midday. United Airlines (UA) operates 8 weekly morning flights, with the earliest setting off at 5:45AM.
How many afternoon flights are there from STL to IAD?
Forget about the crack-of-dawn race to the airport and book one of the 14 weekly afternoon and evening flights from STL to IAD. Afternoon and evening services operated by United Airlines (UA) jet off from 6:00PM. In total, this airline operates 14 weekly flights that depart after midday.
What is the earliest departure time out of St. Louis to Loudoun County?
Set off from STL at 12:45AM and arrive at IAD at 2:40AM. This flight is the earliest you’ll find on this route.
What is the latest departure time out of St. Louis to Loudoun County?
The latest flight is scheduled to depart STL at 5:45PM and touches down at 7:41PM at IAD. You’ll have adequate time to get ready for this journey.
What is the average price from St. Louis to Loudoun County?
Flights from STL to IAD can be found for around $176. Don’t delay, because fantastic fares tend to go quick! 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 perhaps simply to treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find the cheapest flights from STL to IAD, we’ve got you covered here at Flights.com.

We present you with some of the hottest 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.