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$160+ Cheap flights from Oshkosh, WI to Seattle (SEA)

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SEA
Apr 25 — May 21
Sat 4/25
Sat 5/2
1 adult, Economy
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Cheap flight deals from Oshkosh to Seattle

Cheapest flights from Oshkosh to Seattle
Explore the most affordable flight options available from Oshkosh to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2026.

This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:31 pm
ATW
-
SEA
1 stop8h 05m
American Airlines
Sat 5/211:33 pm
SEA
-
ATW
1 stop8h 54m
American Airlines
Deal found 3/26$319
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:31 pm
ATW
-
SEA
1 stop8h 05m
American Airlines
Sat 5/211:33 pm
SEA
-
ATW
1 stop8h 54m
American Airlines
Deal found 3/25$334
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:31 pm
ATW
-
SEA
1 stop8h 05m
American Airlines
Wed 5/611:33 pm
SEA
-
ATW
1 stop8h 41m
American Airlines
Deal found 3/25$344
This United Airlines deal was found by Cheapflights users on 3/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:38 pm
ATW
-
SEA
1 stop7h 09m
United Airlines
Sun 5/2411:52 pm
SEA
-
ATW
1 stop8h 11m
United Airlines
Deal found 3/24$345
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1511:12 am
ATW
-
SEA
1 stop9h 16m
Delta
Tue 4/2111:14 pm
SEA
-
ATW
1 stop9h 17m
Delta
Deal found 3/25$351
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:31 pm
ATW
-
SEA
1 stop8h 05m
American Airlines
Thu 4/303:17 pm
SEA
-
ATW
1 stop6h 23m
American Airlines
Deal found 3/25$352
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:31 pm
ATW
-
SEA
1 stop8h 05m
American Airlines
Sun 5/310:29 pm
SEA
-
ATW
2 stops9h 58m
American Airlines
Deal found 3/25$354

Find flight deals from Oshkosh to Seattle

Keep the following information in mind while searching for Oshkosh to Seattle flight deals. Data was last updated March 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$319
(American Airlines)

One-way from

$160
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$488
Provider with most accurate pricing for Appleton Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Appleton Intl-Seattle/Tacoma Intl flights.
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From Oshkosh to Seattle/Tacoma Intl
Search Deals
One-way flight from Oshkosh to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Oshkosh to Seattle 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 March 26, 2026.
Use the filters below to find and compare flights from Oshkosh to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Mon 4/27

5:35 pm-12:34 am

1 stop8h 59m

Seattle/Tacoma Intl

Wed 4/29

2:39 pm-11:03 pm

1 stop6h 24m

$344

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sat 4/25

12:34 pm-6:46 pm

1 stop8h 12m

Seattle/Tacoma Intl

Wed 4/29

11:59 pm-9:59 am

1 stop8h 00m

$355

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 6/2

5:30 pm-10:39 pm

1 stop7h 09m

Seattle/Tacoma Intl

Tue 6/9

11:02 am-10:45 pm

2 stops9h 43m

$360

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 5/8

2:43 pm-10:47 pm

1 stop10h 04m

Seattle/Tacoma Intl

Tue 5/19

2:27 pm-11:05 pm

1 stop6h 38m

$444

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 7/10

5:30 pm-10:36 pm

1 stop7h 06m

Seattle/Tacoma Intl

Wed 7/15

10:40 pm-9:58 am

1 stop9h 18m

$445

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 5/12

5:38 pm-10:47 pm

1 stop7h 09m

Seattle/Tacoma Intl

Thu 5/14

6:58 pm-9:59 am

2 stops13h 01m

$449

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 5/29

5:30 pm-11:59 pm

1 stop8h 29m

Seattle/Tacoma Intl

Mon 6/1

10:40 pm-10:03 am

1 stop9h 23m

$455

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 4/14

3:46 pm-10:42 pm

1 stop8h 56m

Seattle/Tacoma Intl

Fri 4/24

2:39 pm-11:58 pm

1 stop7h 19m

$487

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 4/10

2:54 pm-10:44 pm

1 stop9h 50m

Seattle/Tacoma Intl

Tue 4/14

10:55 pm-2:00 pm

2 stops13h 05m

$524

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 6/9

6:20 am-8:46 pm

2 stops16h 26m

Seattle/Tacoma Intl

Tue 6/23

10:40 pm-10:03 am

1 stop9h 23m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Oshkosh to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Oshkosh 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 Oshkosh to Seattle

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

Currently, December is the cheapest month in which you can book a flight from Oshkosh to Seattle (average of $164). Flying from Oshkosh to Seattle in June is currently the most expensive (average of $236). 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 OS9 to SEA?

Find hourly flight availability from Oshkosh to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 26, 2026.

When flying from Oshkosh to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Oshkosh to Seattle

Explore weekly flight availability from Oshkosh to Seattle. 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 March 26, 2026.

The most flights from OS9 to SEA are scheduled on a Monday (4 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Oshkosh to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated March 26, 2026.
Read through reviews of airlines operating flights from Oshkosh to Seattle, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,331 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,331 reviews
Delta
7.9
Good
8,331 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,483 reviews
Delta
7.9
Good
8,331 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,495 reviews
Delta
7.9
Good
8,331 reviews

Overall

7.9

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Oshkosh to Seattle. 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 into for flights to Seattle from Oshkosh?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Oshkosh. On average, Seattle/Tacoma Intl has 0 inbound flights from Oshkosh per day from 7 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How popular is this Oshkosh to Seattle flight route?

    Flights from Oshkosh to Seattle/Tacoma Intl have been viewed 17 times in the past calendar month.

  • How long is the flight from Oshkosh to Seattle?

    United Airlines can get you from Oshkosh to Seattle in just under 8h 59m. Your travel time can differ by up to . The distance from Oshkosh to Seattle is about 1627 mi.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $135. United Airlines flights start at $143 while deals on American Airlines start at $147 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Oshkosh to Seattle consider choosing Air Tahiti Nui (81%), American Airlines (71%) or Alaska Airlines (71%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Oshkosh to Seattle?

    While on average a flight from Oshkosh to Seattle is generally $309, our data shows the cheapest flight currently is $119. When looking at the most popular route, (Appleton Intl - Seattle/Tacoma Intl), you can expect to pay $344 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Oshkosh to Seattle 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 Oshkosh to Seattle?

    Currently, December is the cheapest month in which you can book a flight from Oshkosh to Seattle (average of $164). Flying from Oshkosh to Seattle in June is currently the most expensive (average of $236). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Snoqualmie
Ellensburg
Tukwila
Fife
Lakewood
Leavenworth
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Oshkosh to Seattle

Discover the top 7 airlines that operate flights from Oshkosh to Seattle. 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 March 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$255FlexibilityNo cancel feeOn-time62%
DeltaCheapest$130Average$408FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$176Average$339FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$178Average$442FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$208Average$458FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$226Average$417FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$257Average$381FlexibilityNo cancel feeOn-time85%

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