What is the cheapest airline that flies from United States to Seattle/Tacoma Intl?

Frontier, Alaska Airlines, and Southwest are the most popular carriers operating from United States to Seattle/Tacoma Intl

How long does it take to fly to Seattle?

Flight times vary depending on what airport in United States you fly out of and what airport in Seattle you fly into. For example, flying from San Francisco to Seattle takes 1h 56m on average. On the other hand, flying from Los Angeles to Seattle takes 2h 46m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Seattle?

Alaska Airlines, Delta and Frontier are the top three most popular airlines that fly to Seattle from United States according to our data. Alaska Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 10 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

How many flights depart from United States to Seattle on average per week?

1,613 flights are operational weekly from United States to Seattle as of October 2025. The most popular departure day for this route is Thu, with 30% of flights per week taking off on this day.

How many flights depart from United States to Seattle on average per day?

230 flights are operational daily from United States to Seattle as of October 2025. The most popular departure time for this route is 6:00PM, with 40% of flights per day taking off at noon.

When did momondo last update prices for flights from United States to Seattle/Tacoma Intl Airport?

Prices for flights from United States to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from United States to Seattle/Tacoma Intl Airport?

As of October 2025, there are 10 operators available to choose from for flights from United States to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from United States to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$40 Cheap Flights from the United States to Seattle in 2025/26

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Recent round-trip flight deals from the United States to Seattle

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3:20 pm - 11:53 amONT-SEA

20h 33m1 stop

10:51 am - 1:25 pmSEA-ONT

2h 34mnonstop

$120Frontier

Find Deal

Fri, Dec 12 - Sun, Dec 14

3:20 pm - 11:53 amONT-SEA

20h 33m1 stop

10:51 am - 1:25 pmSEA-ONT

2h 34mnonstop

$121Frontier

Find Deal

Fri, Dec 12 - Sun, Dec 14

6:00 am - 8:57 amONT-SEA

2h 57mnonstop

8:55 pm - 11:29 pmSEA-ONT

2h 34mnonstop

$132Alaska Airlines

Find Deal

Sat, Dec 6 - Sun, Dec 7

10:10 am - 7:36 pmSFO-SEA

9h 26m1 stop

7:41 pm - 9:54 pmSEA-SFO

2h 13mnonstop

$134Alaska Airlines

Find Deal

Fri, Jan 23 - Sun, Jan 25

1:58 pm - 4:22 pmSFO-SEA

2h 24mnonstop

7:10 am - 9:35 amSEA-SFO

2h 25mnonstop

$137Delta

Find Deal

Sat, Nov 15 - Sun, Nov 16

5:30 pm - 11:25 pmSJC-SEA

5h 55m1 stop

7:11 pm - 11:53 pmSEA-SJC

4h 42m1 stop

$140Delta

Find Deal

Sat, Dec 6 - Sun, Dec 7

10:48 pm - 12:59 amSFO-SEA

2h 11mnonstop

1:35 pm - 3:52 pmSEA-SFO

2h 17mnonstop

$173United Airlines

Find Deal

Tue, Dec 23 - Thu, Dec 25

1:45 pm - 9:14 pmONT-SEA

7h 29m1 stop

12:37 pm - 5:41 pmSEA-ONT

5h 04m1 stop

$177United Airlines

Find Deal

Sat, Feb 28 - Tue, Mar 3

3:32 pm - 5:50 pmDFW-SEA

4h 18mnonstop

12:31 am - 6:20 amSEA-DFW

3h 49mnonstop

$178American Airlines

Find Deal

Sun, Dec 7 - Sat, Dec 13

7:15 am - 9:45 amDFW-SEA

4h 30mnonstop

12:41 am - 6:30 amSEA-DFW

3h 49mnonstop

$194American Airlines

Find Deal

Wed, Nov 26 - Tue, Dec 2

Frontier flights from United States to Seattle

Our best Frontier deals on United States to Seattle flight tickets

Frontier

Dec 12

ONT3:20 pmOntario

20h 33m

1 stop

SEA11:53 amSeattle/Tacoma Intl

Dec 14

SEA10:51 amSeattle/Tacoma Intl

2h 34m

ONT1:25 pmOntario

$120

Find similar

Frontier

Dec 12

ONT3:20 pmOntario

20h 33m

1 stop

SEA11:53 amSeattle/Tacoma Intl

Dec 14

SEA10:51 amSeattle/Tacoma Intl

2h 34m

ONT1:25 pmOntario

$121

Find similar

Frontier

Dec 12

LAX10:24 amLos Angeles

3h 06m

SEA1:30 pmSeattle/Tacoma Intl

Dec 18

SEA6:00 amSeattle/Tacoma Intl

2h 46m

LAX8:46 amLos Angeles

$122

Find similar

Southwest flights from United States to Seattle

Our best Southwest deals on United States to Seattle flight tickets

Southwest

Dec 4

SFO7:25 amSan Francisco

9h 05m

2 stops

SEA4:30 pmSeattle/Tacoma Intl

Dec 7

SEA5:35 amSeattle/Tacoma Intl

8h 30m

1 stop

SFO2:05 pmSan Francisco

$136

Find similar

Southwest

Dec 4

SFO5:20 amSan Francisco

6h 35m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Dec 8

SEA12:10 pmSeattle/Tacoma Intl

8h 00m

2 stops

SFO8:10 pmSan Francisco

$141

Find similar

Southwest

Nov 12

SJC4:40 pmSan Jose

6h 15m

1 stop

SEA10:55 pmSeattle/Tacoma Intl

Nov 14

SEA5:35 amSeattle/Tacoma Intl

9h 50m

2 stops

SJC3:25 pmSan Jose

$142

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 12/12

3:20 pm-11:53 am

1 stop20h 33m

Seattle/Tacoma Intl

Sun 12/14

10:51 am-1:25 pm

Nonstop2h 34m

$120

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 12/12

3:20 pm-11:53 am

1 stop20h 33m

Seattle/Tacoma Intl

Sun 12/14

10:51 am-1:25 pm

Nonstop2h 34m

$121

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 12/6

6:00 am-8:57 am

Nonstop2h 57m

Seattle/Tacoma Intl

Sun 12/7

8:55 pm-11:29 pm

Nonstop2h 34m

$132

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Fri 1/23

10:10 am-7:36 pm

1 stop9h 26m

Seattle/Tacoma Intl

Sun 1/25

7:41 pm-9:54 pm

Nonstop2h 13m

$134

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Sat 11/15

1:58 pm-4:22 pm

Nonstop2h 24m

Seattle/Tacoma Intl

Sun 11/16

7:10 am-9:35 am

Nonstop2h 25m

$137

San JoseSeattle

SJC - SEA

SJCSEA

San Jose

Sat 12/6

5:30 pm-11:25 pm

1 stop5h 55m

Seattle/Tacoma Intl

Sun 12/7

7:11 pm-11:53 pm

1 stop4h 42m

$140

San FranciscoSeattle

SFO - SEA

SFOSEA

San Francisco

Tue 12/23

10:48 pm-12:59 am

Nonstop2h 11m

Seattle/Tacoma Intl

Thu 12/25

1:35 pm-3:52 pm

Nonstop2h 17m

$173

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 2/28

1:45 pm-9:14 pm

1 stop7h 29m

Seattle/Tacoma Intl

Tue 3/3

12:37 pm-5:41 pm

1 stop5h 04m

$177

DallasSeattle

DFW - SEA

DFWSEA

Dallas/Fort Worth

Sun 12/7

3:32 pm-5:50 pm

Nonstop4h 18m

Seattle/Tacoma Intl

Sat 12/13

12:31 am-6:20 am

Nonstop3h 49m

$178

DallasSeattle

DFW - SEA

DFWSEA

Dallas/Fort Worth

Wed 11/26

7:15 am-9:45 am

Nonstop4h 30m

Seattle/Tacoma Intl

Tue 12/2

12:41 am-6:30 am

Nonstop3h 49m

$194

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from United States to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Seattle?

In general, September is the cheapest month to fly from United States to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $317. If you don’t want to visit Seattle in September, then you should wait until October to fly from United States, when ticket prices are also cheap, with an average price of $317.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from United States is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $475. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from United States because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $566.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from United States in the evening is the least expensive time of day to depart. momondo users have found prices as low as $396 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $569. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest United States to Seattle/Tacoma Intl flight route?

Fly from San Francisco to Seattle/Tacoma Intl for the best United States - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $414 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United States for as low as $348 on momondo.

What cabin class options are available on United States to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on United States to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to Seattle flights?

No. A direct flight is the cheapest option for a flight between United States to Seattle.

Cheap United States to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Seattle

Best Price Found	$115
Fastest flight time	1h 56m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from United States in the past 72 hours is $115. The best round-trip flight deal from United States to Seattle found on momondo in the last 72 hours is $151.

The fastest flight from United States to Seattle takes 1h 56m

Direct flights go from United States to Seattle every day.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

When did momondo last update prices for flights from United States to Seattle/Tacoma Intl Airport?
Prices for flights from United States to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from United States to Seattle/Tacoma Intl Airport?
As of October 2025, there are 10 operators available to choose from for flights from United States to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from United States to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from United States to Seattle?
momondo data reveals that the most frequently booked plane model on the route from United States to Seattle is Boeing 737-900 Passenger/BBJ3 (winglets), representing 17.68% of all bookings. The subsequent popular models are Boeing 737 MAX 9 at 16.66%, Boeing 737-800 Passenger/BBJ2 (winglets) at 15.50%, and Airbus A321neo at 8.09%.

Best airlines flying from United States to Seattle

Compare and see reviews for airlines that fly from United States to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $49	Free Cancellation	Rating 5.8 3,128 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $58	Free Cancellation	Rating 6.3 8,098 reviews	Search Spirit Airlines flights
Delta	PriceFrom $98	Free Cancellation	Rating 7.9 7,981 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $103	Free Cancellation	Rating 7.8 2,788 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $131	Free Cancellation	Rating 8.0 11,155 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 8,991 reviews	Search United Airlines flights
JetBlue	PriceFrom $134	Free Cancellation	Rating 7.2 2,908 reviews	Search JetBlue flights
Southwest	PriceFrom $136	Free Cancellation	Rating 8.0 4,237 reviews	Search Southwest flights
Sun Country Air	PriceFrom $167	Free Cancellation	Rating 6.9 334 reviews	Search Sun Country Air flights
American Airlines	PriceFrom $177	Free Cancellation	Rating 7.2 11,028 reviews	Search American Airlines flights

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Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

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Tukwila

Lakewood

Federal Way

Kirkland

Fife

Redmond

Cle Elum

Centralia

Shoreline

Westport

Why use momondo?

Why should I use momondo to find a flight deal from United States to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from United States to Seattle for you.

Can I find flights from United States to Seattle with flexible booking policies on momondo?

Flights from United States to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from United States to Seattle?

Once all potential United States to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from United States to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from United States. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from the United States to Seattle from $70

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Seattle departing on 10/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Find the cheapest flights from the United States to Seattle

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Recent one-way flight deals from the United States to Seattle

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Frontier flights from United States to Seattle

Our best Frontier deals on United States to Seattle flight tickets

Southwest flights from United States to Seattle

Our best Southwest deals on United States to Seattle flight tickets

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See travel insights to Seattle from

How to get the cheapest flight ticket from United States to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

What is the cheapest United States to Seattle/Tacoma Intl flight route?

Fly from San Francisco to Seattle/Tacoma Intl for the best United States - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

What cabin class options are available on United States to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on United States to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to Seattle flights?

No. A direct flight is the cheapest option for a flight between United States to Seattle.

What is the cheapest airline that flies from United States to Seattle/Tacoma Intl?

Frontier, Alaska Airlines, and Southwest are the most popular carriers operating from United States to Seattle/Tacoma Intl

What airlines fly to Seattle?

How many flights depart from United States to Seattle on average per day?

230 flights are operational daily from United States to Seattle as of October 2025. The most popular departure time for this route is 6:00PM, with 40% of flights per day taking off at noon.

How many flights depart from United States to Seattle on average per week?

1,613 flights are operational weekly from United States to Seattle as of October 2025. The most popular departure day for this route is Thu, with 30% of flights per week taking off on this day.

How long does it take to fly to Seattle?

Cheap United States to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Seattle

Best Price Found

Fastest flight time

Direct flights

Airports in Seattle

When did momondo last update prices for flights from United States to Seattle/Tacoma Intl Airport?

How many operators does momondo search for flights from United States to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from United States to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from United States to Seattle?

Best airlines flying from United States to Seattle

Compare and see reviews for airlines that fly from United States to Seattle with momondo

Traveling to a place near Seattle?

Why use momondo?

Why should I use momondo to find a flight deal from United States to Seattle?

Can I find flights from United States to Seattle with flexible booking policies on momondo?

How can momondo help me find flights from United States to Seattle?

I’m not ready to book a flight from United States to Seattle right now. Can momondo alert me if prices change?

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Washington