HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

Find cheap Frontier flights to Seattle

RDU — SEA
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Leverage Cheapflights for Your Next Trip

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find Frontier flight deals to Seattle

Cheapest Frontier flights from USA to Seattle
Explore the most affordable Frontier flight options available from USA to Seattle. Find the lowest fares with prices last updated on July 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:05 pm
SFO
-
SEA
1 stop13h 34m
Frontier
Tue 8/2510:34 am
SEA
-
SFO
1 stop10h 06m
Frontier
Deal found 7/26$171
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/229:33 am
SFO
-
SEA
1 stop10h 05m
Frontier
Sat 8/2910:34 am
SEA
-
SFO
1 stop10h 06m
Frontier
Deal found 7/23$173
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:33 am
SFO
-
SEA
1 stop9h 25m
Frontier
Mon 9/2111:06 am
SEA
-
SFO
1 stop10h 21m
Frontier
Deal found 7/26$177

Flights to Seattle with Frontier at a glance

Find detailed information about Frontier flights from USA to Seattle. Explore the options provided by Frontier to plan your journey from USA to Seattle. Data last updated July 27, 2026.

Popular in

June

Cheapest in

January

Average price

$180

Round-trip from

$165

One-way from

$90

Good round-trip deal

$277 or less
Highest demand for flights to Seattle with Frontier; 26% potential price increase.
Search Deals
Best time to find cheap flights to Seattle with Frontier; 4% potential price drop.
Search Deals
Average price for flights to Seattle with Frontier (round-trip).
Search Deals
Frontier
  • Frontier
  • 9/22-9/29
  • 2 total stops
  • 17h 03m total
  • USA to Seattle
Search Deals
Frontier
  • Frontier
  • 8/12
  • 1 total stop
  • 12h 57m total
  • USA to Seattle
Search Deals
Price to beat on a round-trip flight from the United States to Seattle with Frontier.
Search Deals

Cheapflights Insights

Find cheap Frontier flights to Seattle

How long is the flight to Seattle with Frontier?

On average, Frontier flights from the United States to Seattle take 4 hours 33 minutes. Flights to Seattle from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.

Frontier weekly flight availability to Seattle

The most flights to Seattle operated by Frontier are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

When is the best time to book a flight to Seattle with Frontier?

The best time to book a flight to Seattle with Frontier is 46 days before departure. On average, fares are higher if you book on the same day as departure.

When is the cheapest time to fly to Seattle with Frontier?

Users looking for the cheapest Frontier fares to Seattle should consider flying on Wednesday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday afternoons, when prices are usually at their highest.

FAQs about flights to Seattle with Frontier

  • Which airport do Frontier flights arrive at when travelling to Seattle?

    Frontier flights on this route tend to land at Seattle/Tacoma Intl Airport.

  • Is Frontier the cheapest airline for a flight to Seattle?

    Flight prices will depend on many factors like date, time and cabin class so it is worth comparing flights before booking. Based on Cheapflights data the cheapest average return price for flights to Seattle tends to be with Spirit Airlines.

  • Are there alternative airlines other than Frontier that fly to Seattle?

    Alaska Airlines, Delta and American Airlines all fly to Seattle and offer an alternative to Frontier.

  • How much is a flight to Seattle with Frontier?

    The average price for a return flight with Frontier is $264; with a one-way flight around $168.

See more FAQs

Reviews of Frontier

See what Cheapflights users have to say about their Frontier experience.
Frontier
5.6
Fair
2,755 reviews
Overview

Entertainment

4.3

Food

4.5

Comfort

5.4

Boarding

5.9

Crew

6.6

Popular Frontier flights

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.