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$153+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SEA
Jun 9 — Jun 161
Tue 6/9
Tue 6/16
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 May 10, 2026.

This Delta deal was found by Cheapflights users on 5/9. 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.
Tue 9/291:26 pm
ATW
-
SEA
1 stop9h 03m
Delta
Wed 10/76:05 am
SEA
-
ATW
1 stop8h 36m
Delta
Deal found 5/9$319
This Delta deal was found by Cheapflights users on 5/8. 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.
Sat 9/126:30 am
ATW
-
SEA
1 stop8h 23m
Delta
Wed 9/166:05 am
SEA
-
ATW
1 stop7h 28m
Delta
Deal found 5/8$329
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Wed 9/95:27 pm
ATW
-
SEA
1 stop7h 15m
United Airlines
Tue 9/157:00 am
SEA
-
ATW
1 stop6h 12m
United Airlines
Deal found 5/8$331
This Delta deal was found by Cheapflights users on 5/6. 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.
Mon 9/141:26 pm
ATW
-
SEA
1 stop9h 03m
Delta
Tue 9/296:05 am
SEA
-
ATW
1 stop7h 28m
Delta
Deal found 5/6$334
This Delta deal was found by Cheapflights users on 5/9. 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.
Fri 9/251:26 pm
ATW
-
SEA
1 stop9h 03m
Delta
Sat 10/1011:05 pm
SEA
-
ATW
1 stop9h 24m
Delta
Deal found 5/9$339
This Delta deal was found by Cheapflights users on 5/8. 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.
Sat 10/1011:10 am
ATW
-
SEA
1 stop9h 28m
Delta
Thu 10/156:05 am
SEA
-
ATW
1 stop8h 36m
Delta
Deal found 5/8$344
This Delta deal was found by Cheapflights users on 5/6. 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 9/94:05 pm
ATW
-
SEA
1 stop6h 19m
Delta
Tue 9/296:05 am
SEA
-
ATW
1 stop7h 28m
Delta
Deal found 5/6$347
This Delta deal was found by Cheapflights users on 5/6. 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.
Mon 9/141:26 pm
ATW
-
SEA
1 stop9h 03m
Delta
Fri 9/2511:05 pm
SEA
-
ATW
1 stop9h 22m
Delta
Deal found 5/6$349
This Delta deal was found by Cheapflights users on 5/9. 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.
Thu 10/11:26 pm
ATW
-
SEA
1 stop9h 03m
Delta
Sat 10/106:05 am
SEA
-
ATW
1 stop8h 36m
Delta
Deal found 5/9$352
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Sat 8/295:00 pm
ATW
-
SEA
1 stop7h 45m
United Airlines
Tue 9/18:40 am
SEA
-
ATW
2 stops10h 18m
United Airlines
Deal found 5/8$353
This American Airlines deal was found by Cheapflights users on 5/6. 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.
Wed 6/36:41 pm
ATW
-
SEA
1 stop7h 35m
American Airlines
Mon 6/811:24 pm
SEA
-
ATW
2 stops9h 23m
American Airlines
Deal found 5/6$354
This Delta deal was found by Cheapflights users on 5/9. 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.
Fri 9/251:26 pm
ATW
-
SEA
1 stop9h 03m
Delta
Mon 10/511:05 pm
SEA
-
ATW
1 stop9h 24m
Delta
Deal found 5/9$359

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 May 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$319
(Delta)

One-way from

$153
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$387
Provider with most accurate pricing for Appleton Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Appleton Intl-Seattle/Tacoma Intl flights.
Search Deals
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. 15% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 10, 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

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 9/25

10:55 am-6:36 pm

1 stop9h 41m

Seattle/Tacoma Intl

Tue 9/29

6:05 am-3:33 pm

1 stop7h 28m

$334

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 9/18

5:27 pm-10:42 pm

1 stop7h 15m

Seattle/Tacoma Intl

Tue 9/22

10:47 pm-9:57 am

1 stop9h 10m

$359

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 9/25

5:35 pm-10:29 pm

1 stop6h 54m

Seattle/Tacoma Intl

Tue 9/29

12:44 pm-12:26 am

2 stops9h 42m

$438
Quickest round-trip

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Mon 8/31

5:00 pm-10:45 pm

1 stop7h 45m

Seattle/Tacoma Intl

Fri 9/4

1:57 pm-10:18 pm

1 stop6h 21m

$453

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sat 5/30

3:49 pm-1:13 am

2 stops11h 24m

Seattle/Tacoma Intl

Wed 6/3

7:00 am-4:54 pm

1 stop7h 54m

$464

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Thu 9/24

1:26 pm-8:29 pm

1 stop9h 03m

Seattle/Tacoma Intl

Sun 9/27

11:05 pm-10:27 am

1 stop9h 22m

$469

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sun 9/20

6:25 am-11:17 am

1 stop6h 52m

Seattle/Tacoma Intl

Mon 9/21

11:10 pm-11:46 am

2 stops10h 36m

$480

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Thu 9/10

6:25 am-11:17 am

1 stop6h 52m

Seattle/Tacoma Intl

Mon 9/14

10:47 pm-9:57 am

1 stop9h 10m

$480

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sun 8/30

6:25 am-3:20 pm

2 stops10h 55m

Seattle/Tacoma Intl

Sat 9/5

7:35 pm-11:46 am

2 stops14h 11m

$505
Cheapest one-way
Quickest one-way

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sat 9/5

4:05 pm-8:24 pm

1 stop6h 19m

$188

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 20 resultsSorted by cheapest first
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 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 May 10, 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.

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 May 10, 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
8,454 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,454 reviews
Delta
7.9
Good
8,454 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,694 reviews
Delta
7.9
Good
8,454 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,667 reviews
Delta
7.9
Good
8,454 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 13 times in the past calendar month.

  • How long is the flight from Oshkosh to Seattle?

    Delta and United Airlines can get you from Oshkosh to Seattle in just under 7h 15m. Your travel time can differ by up to 2h 26m. 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 United Airlines, which is currently one of the cheapest options available, starting at $143. American Airlines flights start at $147 while deals on Delta start at $157 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 Qatar Airways (100%), American Airlines (90%) or Alaska Airlines (90%) 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 $409, our data shows the cheapest flight currently is $158. When looking at the most popular route, (Appleton Intl - Seattle/Tacoma Intl), you can expect to pay $319 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.

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
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Kirkland
Issaquah
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 May 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$255FlexibilityNo cancel feeOn-time62%
DeltaCheapest$130Average$409FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$176Average$339FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$178Average$450FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$206Average$461FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$208Average$369FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$226Average$425FlexibilityNo cancel feeOn-time69%

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