$44 Cheap Frontier Airlines flights Phoenix (PHX) to Seattle (SEA)

Scoring cheap one-way Frontier Airlines flights from PHX to SEA from $44 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares from $83 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.

Browse for one-way or round-trip flights to Seattle in January or February. You could find cheaper fares with Frontier Airlines during these off-peak times.

For cheap Frontier Airlines fares from Sky Harbor Intl. Airport (PHX) to Seattle - Tacoma Intl. Airport (SEA), 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 impact how much you pay. Sunday is typically 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.

You can easily fly from Sky Harbor Intl. Airport (PHX) to Seattle - Tacoma Intl. Airport (SEA) on one of Frontier Airlines’s 4 weekly direct flights. Apply Expedia’s “Nonstop” and “Airline” filters to find the Frontier Airlines flight that’ll land at SEA at a time that suits you.

From takeoff to touchdown, a nonstop Frontier Airlines flight from Sky Harbor Intl. Airport (PHX) to Seattle - Tacoma Intl. Airport (SEA) typically takes 3h 15m.

Taking off from PHX at 2:46PM UTC-7, the first Frontier Airlines flight to SEA arrives at 5:00PM UTC-8. Flying early means you’re less likely to experience delays.* Not an early riser? The last Frontier Airlines flight from PHX to SEA departs at 6:36PM UTC-7 and touches down at 8:52PM UTC-8.*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 Sky Harbor Intl. Airport (PHX) to Seattle touch down at Seattle - Tacoma Intl. Airport (SEA) and Snohomish County - Paine Field Airport (PAE). The main Seattle gateway serviced by this airline is SEA. It’s worth considering flights landing at nearby airports on Expedia as they may offer lower prices.

A rewarding loyalty program and the chance to rack up points through Frontier Miles are the start of the reasons to jet off from PHX to SEA with Frontier Airlines. Plus, when you join Expedia’s free One Key™ program, you can earn OneKeyCash™* in addition to any airline loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

For the Sky Harbor Intl. Airport (PHX) to Seattle - Tacoma Intl. Airport (SEA) route, Frontier Airlines typically operates Airbus A320neo and Airbus A321neo planes. Don’t forget that last-minute changes can occur for operational purposes, so your flight may be on another aircraft.

Changes are typically free within 24 hours of making your booking, but your airline may add a charge after that. For further information about modifying your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to change your itinerary without additional costs, apply the “Changes included” and “No cancel fee” filters when organizing your trip.