$104 Cheap Frontier Airlines flights Ontario (ONT) to Washington (DCA)

You can discover cheap round-trip Frontier Airlines flights from $208 from ONT to DCA by sorting your results from “Price (lowest to highest)” on Expedia. Or look for options from $104 for a one-way trip.**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.

Search for one-way or round-trip flights to Washington in January or February. You could find a cheap fare with Frontier Airlines during these off-peak times.

Start searching one to three months ahead of your departure date to find cheap fares on Frontier Airlines flights from Los Angeles - Ontario Intl. Airport (ONT) to Ronald Reagan Washington National Airport (DCA). 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.* Nail your timing, and you can enjoy significant savings on domestic trips.*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.

Click on the “Nonstop” filter when looking for direct Frontier Airlines flights from ONT to DCA. It’s also an easy way to compare other carriers offering the same nonstop journey.

Sort your results by “Morning” and “Early Morning” to find the earliest flights from ONT to DCA. Heading off early means flight cancellations are less likely.**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.

Frontier Airlines flights from Los Angeles - Ontario Intl. Airport (ONT) to Washington touch down at Ronald Reagan Washington National Airport (DCA). This is the main gateway to this destination.

Offering a rewarding loyalty program, Frontier Airlines is a favorite of many passengers heading from ONT to DCA. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee will generally apply if you cancel or change your booking more than 24 hours after it’s been confirmed. To secure flexible plane tickets, select our “Changes included” and “No cancel fee” boxes when you look for flights. For more details on canceling or modifying your reservation, go to “Trips,” select your flight and tick “Manage Booking.”