$190 Cheap Delta flights Great Falls (GTF) to Washington (IAD)

Apply the “Price (lowest to highest)” filter on Expedia to search for cheap Delta Air Lines return flights from $391 from GTF to IAD. Affordable one-way fares from $190 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Delta Air Lines flights to Washington are usually cheaper in the quieter months of January and February. Whether you’re searching for a one-way or a return ticket, you could land a better deal then.

Look for cheap Delta Air Lines flights from Great Falls Intl. Airport (GTF) to Washington Dulles Intl. Airport (IAD) one to three months ahead of your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the best day to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Fill in your dates, hit search and select “Nonstop” on Expedia to browse any direct flights from GTF to IAD with Delta Air Lines or another carrier.

Search Delta Air Lines’s earliest flights from GTF to IAD by using our “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures are also 20% less likely to be canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Get on a Delta Air Lines flight from Great Falls Intl. Airport (GTF) to Washington, and you’ll most likely arrive at Washington Dulles Intl. Airport (IAD). This is the airline’s main hub in this destination.

Jetting off from GTF to IAD with Delta Air Lines comes with plenty of perks, such as a rewarding loyalty program and an excellent in-flight experience. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to use on select future travel purchases. That’s on top of the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee may apply if you cancel or reschedule your booking more than 24 hours after it has been confirmed. To secure flexible fares, select our “Changes included” and “No cancel fee” boxes while searching for flights. For more details on canceling or modifying your reservation, visit “Trips,” select your flight and tick “Manage Booking.”