Cheap Frontier Airlines flights Milwaukee (MKE) to Washington (IAD)

Landing cheap one-way Frontier Airlines flights from MKE to IAD on Expedia is a breeze — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares for your next exciting getaway.**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.

January is one of the most affordable months to fly to Washington with Frontier Airlines. You could also find fantastic deals on return and one-way tickets in February.

Begin your search one to three months ahead of your travel date to get cheap fares on Frontier Airlines flights from General Mitchell Intl. Airport (MKE) to Washington Dulles Intl. Airport (IAD). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic journeys.*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.

Simply enter your dates, click search and select “Nonstop” on Expedia to browse any direct flights from MKE to IAD with Frontier Airlines or other carriers.

Browse Frontier Airlines’s earliest flights from MKE to IAD by using our “Morning” and “Early Morning” filters. Not only will you get to your destination sooner, early departures also have a 20% less chance of being 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.

Washington Dulles Intl. Airport (IAD) is the primary Washington gateway for Frontier Airlines flights from General Mitchell Intl. Airport (MKE).

Journey from MKE to IAD with Frontier Airlines and you can look forward to a host of benefits including a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you could also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s usually possible to modify or cancel your flight, although additional fees may apply if you booked over 24 hours ago. Prefer to keep your options open? Use Expedia’s “No cancel fee” or “Changes included” filter to find flights that won’t charge you extra if you have to adjust your plans. To modify your itinerary, go to “Trips,” select your flight and click on “Manage Booking” for more information.