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

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

Which airline has the best punctuality record on Seattle to the United States flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

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

The number of flights available between Seattle and United States is 2,476 per week as of December 2025. The most frequent departure day is Thu, with 19% of weekly flights leaving on this day.

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

As of December 2025, there are 353 flights per day flying from Seattle to United States. The most common time of day flights depart is 7:00AM, with 44% of flights taking off at noon.

How often are flights from Seattle to the United States delayed?

Historically, on average around 15% of flights between Seattle and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

What airlines fly to United States?

Alaska Airlines, Delta and Frontier are the top three most popular airlines that fly to United States from Seattle according to our data. Alaska Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 10 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

What is the most punctual flight time for Seattle to the United States flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

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

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

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

As of December 2025, there are 9 operators available to choose from for flights from Seattle/Tacoma Intl Airport to United States.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to United States.

What documentation or ID do you need to fly to United States?

The required travel and health documents for your United States trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United States. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$37 Cheap Flights from Seattle to the United States in 2025/26

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Find the cheapest flights from Seattle to the United States

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:05 pm - 8:40 pm

SEA

LAS

2h 35mnonstop

4:51 pm - 7:47 pm

LAS

SEA

2h 56mnonstop

$67Frontier

Sun, Jan 4 - Fri, Jan 9

7:28 pm - 10:05 pm

SEA

LAS

2h 37mnonstop

6:15 am - 9:04 am

LAS

SEA

2h 49mnonstop

$68Frontier

Sat, Jan 3 - Thu, Jan 8

12:15 pm - 4:12 pm

SEA

PHX

2h 57mnonstop

7:35 pm - 9:53 pm

PHX

SEA

3h 18mnonstop

$91Alaska Airlines

Tue, Jan 27 - Tue, Jan 27

6:54 pm - 10:46 pm

SEA

PHX

2h 52mnonstop

1:16 pm - 3:32 pm

PHX

SEA

3h 16mnonstop

$96Alaska Airlines

Sun, Jan 25 - Wed, Jan 28

7:55 pm - 11:54 pm

SEA

PHX

2h 59mnonstop

6:20 am - 8:37 am

PHX

SEA

3h 17mnonstop

$97Delta

Thu, Jan 8 - Sun, Jan 11

8:40 pm - 7:17 am

SEA

SAN

10h 37m1 stop

6:15 am - 9:28 am

SAN

SEA

3h 13mnonstop

$127Hawaiian Airlines

Fri, Jan 9 - Fri, Jan 16

5:25 am - 12:16 pm

SEA

ONT

6h 51m1 stop

3:30 pm - 6:35 pm

ONT

SEA

3h 05mnonstop

$129Delta

Thu, Jan 15 - Sun, Jan 18

11:35 am - 5:03 pm

SEA

ONT

5h 28m1 stop

1:46 pm - 6:43 pm

ONT

SEA

4h 57m1 stop

$140Hawaiian Airlines

Fri, Jan 9 - Fri, Jan 16

12:35 pm - 8:46 pm

SEA

OGG

10h 11m1 stop

11:25 pm - 11:29 am

OGG

SEA

10h 04m1 stop

$277United Airlines

Sun, Jan 18 - Thu, Jan 22

12:35 pm - 8:46 pm

SEA

OGG

10h 11m1 stop

11:25 pm - 11:30 am

OGG

SEA

10h 05m1 stop

$286United Airlines

Mon, Jan 12 - Mon, Jan 19

Frontier flights from Seattle to United States

Our best Frontier deals on Seattle to United States flight tickets

Frontier

Jan 4

SEA6:05 pmSeattle/Tacoma Intl

2h 35m

LAS8:40 pmLas Vegas Harry Reid Intl

Jan 9

LAS4:51 pmLas Vegas Harry Reid Intl

2h 56m

SEA7:47 pmSeattle/Tacoma Intl

$67

Find similar

Frontier

Jan 3

SEA7:28 pmSeattle/Tacoma Intl

2h 37m

LAS10:05 pmLas Vegas Harry Reid Intl

Jan 8

LAS6:15 amLas Vegas Harry Reid Intl

2h 49m

SEA9:04 amSeattle/Tacoma Intl

$68

Find similar

Frontier

Jan 12

SEA9:02 pmSeattle/Tacoma Intl

2h 38m

LAS11:40 pmLas Vegas Harry Reid Intl

Jan 19

LAS6:45 amLas Vegas Harry Reid Intl

2h 51m

SEA9:36 amSeattle/Tacoma Intl

$69

Find similar

United Airlines flights from Seattle to United States

Our best United Airlines deals on Seattle to United States flight tickets

United Airlines

Jan 20

SEA9:00 amSeattle/Tacoma Intl

2h 59m

LAX11:59 amLos Angeles

Jan 20

LAX4:45 pmLos Angeles

3h 10m

SEA7:55 pmSeattle/Tacoma Intl

$139

Find similar

United Airlines

Dec 16

SEA1:05 pmSeattle/Tacoma Intl

7h 13m

2 stops

PHX9:18 pmPhoenix Sky Harbor Intl

Jan 14

PHX4:31 pmPhoenix Sky Harbor Intl

5h 44m

1 stop

SEA9:15 pmSeattle/Tacoma Intl

$272

Find similar

United Airlines

Dec 17

SEA3:25 pmSeattle/Tacoma Intl

8h 50m

2 stops

PHX1:15 amPhoenix Sky Harbor Intl

Dec 24

PHX2:25 pmPhoenix Sky Harbor Intl

11h 34m

2 stops

SEA12:59 amSeattle/Tacoma Intl

$277

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleLas Vegas

SEA - LAS

SEALAS

Seattle/Tacoma Intl

Sun 1/4

6:05 pm-8:40 pm

Nonstop2h 35m

Las Vegas Harry Reid Intl

Fri 1/9

4:51 pm-7:47 pm

Nonstop2h 56m

$67

SeattleLas Vegas

SEA - LAS

SEALAS

Seattle/Tacoma Intl

Sat 1/3

7:28 pm-10:05 pm

Nonstop2h 37m

Las Vegas Harry Reid Intl

Thu 1/8

6:15 am-9:04 am

Nonstop2h 49m

$68

SeattlePhoenix

SEA - PHX

SEAPHX

Seattle/Tacoma Intl

Tue 1/27

12:15 pm-4:12 pm

Nonstop2h 57m

Phoenix Sky Harbor Intl

Tue 1/27

7:35 pm-9:53 pm

Nonstop3h 18m

$91

SeattlePhoenix

SEA - PHX

SEAPHX

Seattle/Tacoma Intl

Sun 1/25

6:54 pm-10:46 pm

Nonstop2h 52m

Phoenix Sky Harbor Intl

Wed 1/28

1:16 pm-3:32 pm

Nonstop3h 16m

$96

SeattlePhoenix

SEA - PHX

SEAPHX

Seattle/Tacoma Intl

Thu 1/8

7:55 pm-11:54 pm

Nonstop2h 59m

Phoenix Sky Harbor Intl

Sun 1/11

6:20 am-8:37 am

Nonstop3h 17m

$97

SeattleSan Diego

SEA - SAN

SEASAN

Seattle/Tacoma Intl

Fri 1/9

8:40 pm-7:17 am

1 stop10h 37m

San Diego

Fri 1/16

6:15 am-9:28 am

Nonstop3h 13m

$127

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Thu 1/15

5:25 am-12:16 pm

1 stop6h 51m

Ontario

Sun 1/18

3:30 pm-6:35 pm

Nonstop3h 05m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Fri 1/9

11:35 am-5:03 pm

1 stop5h 28m

Ontario

Fri 1/16

1:46 pm-6:43 pm

1 stop4h 57m

$140

SeattleKahului

SEA - OGG

SEAOGG

Seattle/Tacoma Intl

Sun 1/18

12:35 pm-8:46 pm

1 stop10h 11m

Kahului

Thu 1/22

11:25 pm-11:29 am

1 stop10h 04m

$277

SeattleKahului

SEA - OGG

SEAOGG

Seattle/Tacoma Intl

Mon 1/12

12:35 pm-8:46 pm

1 stop10h 11m

Kahului

Mon 1/19

11:25 pm-11:30 am

1 stop10h 05m

$286

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Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Delays

Other information

What is the cheapest month to fly to United States?

In general, September is the cheapest month to fly from Seattle to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $297. If you aren’t able to travel during the month of September, then book flights to United States from Seattle during October instead. Flights to United States in October, while not as cheap as those in September, still average around $297.

What is the cheapest day to depart on your flight to United States?

According to our data, Wednesday is the cheapest day to fly to United States from Seattle. The lowest ticket price found for a Wednesday departure recently was $406. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $536. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

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

The cheapest time of day to fly to United States is in the afternoon when flights can be purchased for as low as $369. Try not to purchase tickets in the morning because they tend to be around $480. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Fly from Seattle/Tacoma Intl to Las Vegas Harry Reid Intl for the best Seattle/Tacoma Intl - United States flight prices

How far in advance should I book a flight to United States?

You are more likely to see cheaper flights to United States from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $400 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Seattle for as low as $266 on momondo.

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to United States 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 Seattle to United States flights?

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

Cheap Seattle to United States flight deals and tips

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

Best Price Found	$68
Fastest flight time	0h 50m
Direct flights	Every day
Airports in United States	4,296 airports

The best one-way flight to United States from Seattle in the past 72 hours is $68. The best round-trip flight deal from Seattle to United States found on momondo in the last 72 hours is $99.

The fastest flight from Seattle to United States takes 0h 50m

Direct flights go from Seattle to United States every day.

There are 4,296 airports in United States. From Seattle there are direct flights to Ontario (ONT), Las Vegas Harry Reid Intl (LAS).

Search flight deals

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to United States?
Prices for flights from Seattle/Tacoma Intl Airport to United States are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to United States?
As of December 2025, there are 9 operators available to choose from for flights from Seattle/Tacoma Intl Airport to United States.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to United States?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to United States.
What documentation or ID do you need to fly to United States?
The required travel and health documents for your United States trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United States. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Seattle to United States?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to United States is Boeing 737-800 Passenger/BBJ2 (winglets) (17.94% of total bookings). The next most popular plane models are Airbus A321neo (13.71%), Boeing 737-900 (10.45%), and Boeing 737 MAX 9 (10.00%).

Best airlines flying from Seattle to United States

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $49	Free Cancellation	Rating 5.8 3,084 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $54	Free Cancellation	Rating 6.3 8,178 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $78	Free Cancellation	Rating 7.8 2,817 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $99	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
United Airlines	PriceFrom $123	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $133	Free Cancellation	Rating 8.0 11,431 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $133	Free Cancellation	Rating 7.9 4,253 reviews	Search Southwest flights
JetBlue	PriceFrom $141	Free Cancellation	Rating 7.2 2,899 reviews	Search JetBlue flights
Sun Country Air	PriceFrom $162	Free Cancellation	Rating 6.9 333 reviews	Search Sun Country Air flights
American Airlines	PriceFrom $176	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to United States. momondo saves you time and could save you money on your trip.

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

Yes. All flights to United States from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Seattle and United States by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Seattle to United States flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Flights to Seattlefrom $58

Cheap flights from Seattle to the United States from $38

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to the United States departing on 1/4. 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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Cheap round-trip flights

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Frontier flights from Seattle to United States

Our best Frontier deals on Seattle to United States flight tickets

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Our best United Airlines deals on Seattle to United States flight tickets

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Use the filters below to find and compare flights from Seattle to the United States that are best for you.

See travel insights to the United States from

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

What is the cheapest month to fly to United States?

What is the cheapest day to depart on your flight to United States?

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

The cheapest time of day to fly to United States is in the afternoon when flights can be purchased for as low as $369. Try not to purchase tickets in the morning because they tend to be around $480. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Fly from Seattle/Tacoma Intl to Las Vegas Harry Reid Intl for the best Seattle/Tacoma Intl - United States flight prices

How far in advance should I book a flight to United States?

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to United States 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 Seattle to United States flights?

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

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

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

What airlines fly to United States?

How often are flights from Seattle to the United States delayed?

Historically, on average around 15% of flights between Seattle and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

What is the most punctual flight time for Seattle to the United States flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Seattle to the United States flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

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

As of December 2025, there are 353 flights per day flying from Seattle to United States. The most common time of day flights depart is 7:00AM, with 44% of flights taking off at noon.

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

The number of flights available between Seattle and United States is 2,476 per week as of December 2025. The most frequent departure day is Thu, with 19% of weekly flights leaving on this day.

Cheap Seattle to United States flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in United States

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

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

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

What documentation or ID do you need to fly to United States?

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

Best airlines flying from Seattle to United States

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

Why use momondo?

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

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

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

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

An easier way to manage your United States 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

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo