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$59+ Cheap flights from Seattle (SEA) to the United States

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
oct. 17 — oct. 241
ven. 10/17
ven. 10/24
1 adult, Economy
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Cheap flight deals from Seattle to USA

Keep the following information in mind while searching for Seattle to USA flight deals. Data was last updated septembre 17, 2025.

Round-trip from

$107
(Mytrip)

One-way from

$59
(Delta)

Popular in

December

Cheapest in

September

Average price

$311

Good round-trip deal

$97 or less

Good one-way deal

$68 or less
From Seattle/Tacoma Intl to USA
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One-way flight from Seattle/Tacoma Intl to USA
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Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to USA.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to USA.
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Find flight deals from Seattle to USA

Cheapest flights from Seattle to USA
Explore the most affordable flight options available from Seattle to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septembre 17, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/248:43 pmSEA - ONT
1 stop27h 07mFrontier
lun. 10/2710:30 amONT - SEA
Nonstop2h 56mFrontier
Deal found 9/15$107
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 10/199:58 pmSEA - PHX
Nonstop2h 59mFrontier
ven. 10/245:53 pmPHX - SEA
Nonstop3h 15mFrontier
Deal found 9/15$107
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/317:17 pmSEA - ONT
Nonstop2h 41mFrontier
dim. 11/28:02 amONT - SEA
Nonstop2h 53mFrontier
Deal found 9/16$108
This Priceline deal was found by Cheapflights users on 9/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 10/309:22 pmSEA - PHX
Nonstop3h 02mFrontier
sam. 11/16:00 amPHX - SEA
Nonstop3h 18mFrontier
Deal found 9/16$108
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
dim. 10/51:22 pmSEA - LAS
Nonstop2h 42mFrontier
jeu. 10/912:18 pmLAS - SEA
Nonstop2h 58mFrontier
Deal found 9/16$108
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/38:31 pmSEA - PHX
Nonstop2h 58mFrontier
dim. 10/56:05 amPHX - SEA
Nonstop3h 15mFrontier
Deal found 9/15$109
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/311:43 amSEA - LAS
Nonstop2h 46mFrontier
sam. 11/153:29 pmLAS - SEA
Nonstop3h 03mFrontier
Deal found 9/15$109
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
lun. 9/298:31 pmSEA - PHX
Nonstop3h 00mFrontier
lun. 10/66:05 amPHX - SEA
Nonstop3h 15mFrontier
Deal found 9/15$110
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 10/51:22 pmSEA - LAS
Nonstop2h 42mFrontier
ven. 10/1012:18 pmLAS - SEA
Nonstop2h 58mFrontier
Deal found 9/15$110
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/108:22 pmSEA - PHX
Nonstop3h 02mFrontier
lun. 11/176:00 amPHX - SEA
Nonstop3h 18mFrontier
Deal found 9/15$111
This Priceline deal was found by Cheapflights users on 9/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 10/301:18 pmSEA - ONT
1 stop10h 32mFrontier
dim. 11/28:02 amONT - SEA
Nonstop2h 53mFrontier
Deal found 9/14$112
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/142:22 pmSEA - PHX
1 stop9h 07mFrontier
sam. 11/156:00 amPHX - SEA
Nonstop3h 18mFrontier
Deal found 9/15$112

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to USA that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septembre 17, 2025.
Use the filters below to find and compare flights from Seattle to the United States that are best for you.

Fly from

Seattle

Fly to

USA

Route

Depart

Return

Price

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

ven. 10/24

7:55 pm-10:41 pm

Nonstop2h 46m

Ontario

jeu. 10/30

7:35 am-10:35 am

Nonstop3h 00m

$133

SeattlePhoenix

SEA - PHX

SEAPHX

Seattle/Tacoma Intl

jeu. 12/11

5:15 am-9:00 am

Nonstop2h 45m

Phoenix Sky Harbor Intl

lun. 12/15

8:45 pm-10:55 pm

Nonstop3h 10m

$133

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

mer. 10/15

7:55 pm-10:41 pm

Nonstop2h 46m

Ontario

sam. 10/18

7:35 am-10:35 am

Nonstop3h 00m

$133

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

sam. 10/25

8:15 am-11:08 am

Nonstop2h 53m

Ontario

mer. 10/29

11:48 am-2:45 pm

Nonstop2h 57m

$133

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

mer. 10/22

8:15 am-11:08 am

Nonstop2h 53m

Ontario

lun. 10/27

7:35 am-10:35 am

Nonstop3h 00m

$133

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

mar. 10/21

7:55 pm-10:41 pm

Nonstop2h 46m

Ontario

lun. 10/27

7:35 am-10:35 am

Nonstop3h 00m

$133

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

ven. 10/24

7:55 pm-10:41 pm

Nonstop2h 46m

Ontario

lun. 10/27

7:35 am-10:35 am

Nonstop3h 00m

$133

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

mer. 10/22

8:15 am-11:08 am

Nonstop2h 53m

Ontario

mar. 10/28

7:35 am-10:35 am

Nonstop3h 00m

$133

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

mar. 11/18

4:40 pm-6:57 pm

Nonstop2h 17m

San Francisco

mar. 11/25

6:00 am-8:23 am

Nonstop2h 23m

$137

SeattleSan Francisco

SEA - SFO

SEASFO

Seattle/Tacoma Intl

mer. 10/8

8:00 am-10:22 am

Nonstop2h 22m

San Francisco

mer. 10/8

1:23 pm-7:10 pm

1 stop5h 47m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
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Best time to book a flight from Seattle to USA

Have a flexible travel schedule? Discover the best time to fly to USA from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to the United States

What is the cheapest month to book a flight from Seattle to USA?

Currently, January is the cheapest month in which you can book a flight from Seattle to USA (average of $246). Flying from Seattle to USA in March is currently the most expensive (average of $325). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to US?

Find hourly flight availability from Seattle to USA. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septembre 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to USA as you normally would.

Weekly flight availability from Seattle to USA

Explore weekly flight availability from Seattle to USA. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated septembre 17, 2025.

The most flights from SEA to US0 are scheduled on a Monday (126 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (58 on average).

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to USA. Reviews last updated septembre 17, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Seattle to the United States have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,174 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to USA. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to United States?

    If you book a flight to United States from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How popular is this Seattle to USA flight route?

    Within the past month, 307 users have taken a look at flights from Seattle/Tacoma Intl to United States.

  • How long is the flight from Seattle to USA?

    For as low as $141, Delta can have you in USA from Seattle in 2h 22m. The distance between Seattle and USA is about 679 mi. All flights are typically nonstop.

  • What are the cheapest airlines to fly from Seattle to USA one-way?

    The cheapest airlines for a one-way flight from Seattle to USA are Delta ($59), Southwest ($59), and Alaska Airlines ($78).

  • What are the most popular routes from Seattle to USA?

    While some choose either Seattle/Tacoma Intl - Los Angeles or Seattle/Tacoma Intl - Dallas/Fort Worth, Seattle/Tacoma Intl - Las Vegas Harry Reid Intl is the most popular route from Seattle to USA.

  • What are the most reliable airlines from Seattle to USA?

    Before booking your flight to USA from Seattle, check out the most reliable airlines to get you to your destination on time: China Eastern (97%), SkyWest Airlines (94%), ITA Airways( 94%).

  • What are the cheapest flights from Seattle to USA?

    On average you can expect to pay $545 for a flight from Seattle to USA. The cheapest flight overall is $87 while the most popular route, (Seattle/Tacoma Intl - Las Vegas Harry Reid Intl) is currently priced at $108.

  • Can I find deals for flights from Seattle to USA that include hotel bookings?

    Yes. In addition to deals on Seattle to USA flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to USA?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to USA.

  • Can I find deals for business class flights from Seattle to USA?

    Yes. Cheapflights offers flight deals from Seattle to USA by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to USA?

    Currently, January is the cheapest month in which you can book a flight from Seattle to USA (average of $246). Flying from Seattle to USA in March is currently the most expensive (average of $325). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Seattle to USA

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Top 10 airlines flying from Seattle to USA

Discover the top 10 airlines that operate flights from Seattle to USA. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$46Average$209FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$48Average$221FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$78Average$327FlexibilityNo cancel feeOn-time85%
DeltaCheapest$97Average$335FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$122Average$350FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$127Average$382FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$131Average$392FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$131Average$338FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$162Average$380FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$167Average$423FlexibilityNo cancel feeOn-time71%

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