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$155+ 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SEA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheapflights Tip: The best prices from Oshkosh to Seattle/Tacoma Intl are usually found in February or January, booked 58 days in advance, depart on a Tuesday or Monday and return on a Saturday

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 December 18, 2025.

This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amATW - SEA
1 stop8h 58mDelta
Fri 12/2612:55 amSEA - ATW
1 stop8h 37mDelta
Deal found 12/16$413
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:23 pmATW - SEA
1 stop7h 24mUnited Airlines
Wed 12/318:00 amSEA - ATW
2 stops11h 37mUnited Airlines
Deal found 12/16$444
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Thu 12/181:00 pmATW - SEA
1 stop7h 46mUnited Airlines
Thu 12/2512:37 pmSEA - ATW
1 stop6h 16mUnited Airlines
Deal found 12/17$478
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/211:00 pmATW - SEA
2 stops12h 12mUnited Airlines
Sat 12/277:00 amSEA - ATW
1 stop7h 48mUnited Airlines
Deal found 12/16$529
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:16 amATW - SEA
1 stop7h 42mUnited Airlines
Sun 12/287:00 amSEA - ATW
1 stop7h 48mUnited Airlines
Deal found 12/16$564
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/198:10 amATW - SEA
2 stops11h 56mUnited Airlines
Fri 12/267:00 amSEA - ATW
1 stop7h 48mUnited Airlines
Deal found 12/17$576

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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$296
(American Airlines)

One-way from

$155
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$482
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. 14% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 18, 2025.
Use the filters below to find and compare flights from Oshkosh to Seattle that are best for you.

Fly from

Oshkosh

Fly to

Seattle

Route

Depart

Return

Price

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 1/13

7:15 am-1:08 pm

1 stop7h 53m

Seattle/Tacoma Intl

Tue 1/20

11:55 am-9:57 pm

1 stop8h 02m

$296

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 2/3

4:20 pm-8:46 pm

1 stop6h 26m

Seattle/Tacoma Intl

Mon 2/9

11:10 pm-10:23 am

1 stop9h 13m

$297

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 2/3

2:45 pm-12:59 am

2 stops12h 14m

Seattle/Tacoma Intl

Mon 2/9

7:00 am-4:48 pm

1 stop7h 48m

$302

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 1/13

3:39 pm-12:59 am

2 stops11h 20m

Seattle/Tacoma Intl

Tue 1/20

7:00 am-4:48 pm

1 stop7h 48m

$302

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 2/3

7:15 am-5:45 pm

2 stops12h 30m

Seattle/Tacoma Intl

Mon 2/9

9:45 pm-10:55 am

2 stops11h 10m

$307

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Thu 1/8

12:03 pm-4:45 pm

1 stop6h 42m

Seattle/Tacoma Intl

Sun 1/11

6:05 am-3:40 pm

1 stop7h 35m

$312

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 5/1

5:35 pm-10:42 pm

1 stop7h 07m

Seattle/Tacoma Intl

Sat 5/9

7:00 am-4:50 pm

1 stop7h 50m

$359

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 4/28

6:30 am-12:18 pm

1 stop7h 48m

Seattle/Tacoma Intl

Mon 5/11

11:05 pm-10:27 am

1 stop9h 22m

$368

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 4/28

6:30 am-12:18 pm

1 stop7h 48m

Seattle/Tacoma Intl

Fri 5/8

11:05 pm-10:27 am

1 stop9h 22m

$368

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 1/6

6:25 pm-11:21 am

2 stops42h 56m

$155

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 17 results
1
2

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, February is the cheapest month in which you can book a flight from Oshkosh to Seattle (average of $143). Flying from Oshkosh to Seattle in June is currently the most expensive (average of $233). 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 December 18, 2025.

When flying from Oshkosh to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 46% versus a flight in the morning.

What is the cheapest day to fly from Oshkosh to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Oshkosh to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Oshkosh to Seattle flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 18, 2025.
Read through reviews of airlines operating flights from Oshkosh to Seattle, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,005 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

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
8,005 reviews
Delta
7.9
Good
8,005 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

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
9,091 reviews
Delta
7.9
Good
8,005 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

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
7.2
Good
11,054 reviews
Delta
7.9
Good
8,005 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Overall

7.9

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 8 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 26 times in the past calendar month.

  • How long is the flight from Oshkosh to Seattle?

    American Airlines, Delta, and United Airlines can get you from Oshkosh to Seattle in just under 6h 26m. Your travel time can differ by up to 5h 48m. The distance from Oshkosh to Seattle is about 1627 mi. This flight may include one or multiple stops.

  • 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. American Airlines flights start at $147 while deals on United Airlines start at $165 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 Hawaiian Airlines (70%), American Airlines (70%) or Air Tahiti Nui (70%) 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 $392, our data shows the cheapest flight currently is $127. When looking at the most popular route, (Appleton Intl - Seattle/Tacoma Intl), you can expect to pay $297 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, February is the cheapest month in which you can book a flight from Oshkosh to Seattle (average of $143). Flying from Oshkosh to Seattle in June is currently the most expensive (average of $233). 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
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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Top 8 airlines flying from Oshkosh to Seattle

Discover the top 8 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$122Average$290FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$137Average$374FlexibilityNo cancel feeOn-time83%
DeltaCheapest$175Average$416FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$176Average$384FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$181Average$473FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$443FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$239Average$480FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$257Average$400FlexibilityNo cancel feeOn-time85%

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