$108 Cheap Frontier Airlines flights Seattle (SEA) to Raleigh (RDU)

Landing cheap one-way Frontier Airlines flights from SEA to RDU from $108 on Expedia couldn't be easier --- just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $240 for your next exciting vacation.**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.

For cheap Frontier Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to Raleigh - Durham Intl. Airport (RDU), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall cost. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**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.

Browse Frontier Airlines's earliest flights from SEA to RDU 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.

A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to travel from SEA to RDU with Frontier Airlines. Plus, when you join Expedia's free One Key™ program, you can receive OneKeyCash™* alongside any airline loyalty program earnings. It's yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.