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$184+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SEA
Sep 12 — Sep 191
Sat 9/12
Sat 9/19
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 August 13, 2026.

This Delta deal was found by Cheapflights users on 8/11. 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 9/125:07 pm -
1 stop6h 58m
Tue 9/2211:59 pm -
1 stop8h 18m
Deal found 8/11$329
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/236:30 am -
1 stop7h 02m
Tue 9/2911:14 pm -
2 stops10h 29m
Deal found 8/10$334
This Delta deal was found by Cheapflights users on 8/11. 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 9/125:07 pm -
1 stop6h 58m
Fri 9/1811:59 pm -
1 stop8h 18m
Deal found 8/11$344
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/65:00 pm -
1 stop7h 43m
Sat 9/126:32 am -
2 stops10h 33m
Deal found 8/12$349
This Delta deal was found by Cheapflights users on 8/12. 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 9/102:00 pm -
1 stop10h 05m
Sun 9/136:00 am -
1 stop7h 37m
Deal found 8/12$359
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Mon 8/319:15 am -
1 stop30h 07m
Sat 9/57:06 pm -
2 stops25h 59m
Deal found 8/10$364
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Mon 8/319:15 am -
1 stop26h 04m
Fri 9/41:35 pm -
1 stop7h 35m
Deal found 8/10$368
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Thu 10/223:31 pm -
2 stops44h 20m
Thu 10/297:41 pm -
1 stop25h 26m
Deal found 8/10$372
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Tue 11/1012:50 pm -
2 stops10h 29m
Sat 11/1410:50 am -
1 stop6h 18m
Deal found 8/8$373
This Delta deal was found by Cheapflights users on 8/11. 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 9/125:07 pm -
1 stop6h 58m
Mon 9/2111:59 pm -
1 stop8h 18m
Deal found 8/11$374
This United Airlines deal was found by Cheapflights users on 8/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:00 am -
2 stops12h 37m
Sat 10/241:56 pm -
1 stop7h 02m
Deal found 8/9$377

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 August 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$329
(Delta)

One-way from

$184
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$498
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.
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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. 13% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 13, 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 Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Wed 1/27

6:30 am-12:30 pm

1 stop8h 00m

Seattle/Tacoma Intl

Mon 2/1

1:45 pm-9:35 pm

1 stop5h 50m

$344

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Thu 9/10

4:19 pm-8:36 pm

1 stop6h 17m

Seattle/Tacoma Intl

Tue 9/15

11:59 pm-10:17 am

1 stop8h 18m

$344

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Sun 9/6

5:00 pm-10:43 pm

1 stop7h 43m

Seattle/Tacoma Intl

Sat 9/12

6:32 am-7:05 pm

2 stops10h 33m

$349

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Sun 9/13

6:00 am-10:39 am

1 stop6h 39m

Seattle/Tacoma Intl

Thu 9/24

11:59 pm-10:17 am

1 stop8h 18m

$359
Quickest round-trip

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Thu 1/28

12:06 pm-4:35 pm

1 stop6h 29m

Seattle/Tacoma Intl

Sat 1/30

1:45 pm-9:35 pm

1 stop5h 50m

$374

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Fri 11/6

12:50 pm-9:19 pm

2 stops10h 29m

Seattle/Tacoma Intl

Mon 11/9

2:30 pm-11:17 pm

1 stop6h 47m

$399

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Fri 10/2

11:09 am-6:45 pm

1 stop9h 36m

Seattle/Tacoma Intl

Sun 10/4

11:59 pm-10:17 am

1 stop8h 18m

$429

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Thu 9/10

6:31 pm-12:11 am

1 stop7h 40m

Seattle/Tacoma Intl

Sun 9/20

11:57 pm-11:06 am

1 stop9h 09m

$434

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Wed 1/27

10:34 am-9:56 pm

2 stops13h 22m

Seattle/Tacoma Intl

Tue 2/2

7:00 am-3:10 pm

1 stop6h 10m

$434

AppletonSeattle

ATW Appleton Intl - SEA Seattle/Tacoma Intl

ATWSEA

Appleton Intl

Thu 9/10

10:00 am-6:29 pm

2 stops10h 29m

Seattle/Tacoma Intl

Sun 9/13

7:00 am-3:33 pm

1 stop6h 33m

$450

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 19 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 August 13, 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 August 13, 2026.

The most flights from OS9 to SEA are scheduled on a Wednesday (6 on average). You will have fewer flight options on Sunday, 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?

Airfare is below average for this route at the moment.
Oshkosh to Seattle flights typically cost between $418 and $564 in September.
The cheapest round-trip price found within the last 5 days was $329 on Delta (Sep 12-Sep 19).

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 August 13, 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
7.8
Good
8,510 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
Delta
7.8
Good
8,510 reviews
Delta
7.8
Good
8,510 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
United Airlines
7.4
Good
10,114 reviews
Delta
7.8
Good
8,510 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
American Airlines
7.1
Good
11,929 reviews
Delta
7.8
Good
8,510 reviews

Overall

7.8

Boarding

8.1

Crew

8.5

Comfort

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.

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 6 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 10 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 7h 40m. Your travel time can differ by up to 20m. The distance from Oshkosh to Seattle is about 1627 mi. This flight may include one or multiple stops.

  • 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 Alaska Airlines (84%), American Airlines (83%) or Qatar Airways (79%) 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 $1,231, our data shows the cheapest flight currently is $238. When looking at the most popular route, (Appleton Intl - Seattle/Tacoma Intl), you can expect to pay $329 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
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Lynnwood
Tumwater
Centralia
Puyallup
Marysville
Kent
Ellensburg
Fife
Ocean Shores
Lakewood
Poulsbo

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Top 6 airlines flying from Oshkosh to Seattle

Discover the top 6 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 August 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$178Average$446FlexibilityNo cancel feeOn-time71%
DeltaCheapest$178Average$428FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$196Average$401FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$206Average$485FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$232Average$429FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$257Average$391FlexibilityNo cancel feeOn-time85%

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