HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$158+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SEA
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oshkosh to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Oshkosh to Seattle/Tacoma Intl are usually found in January or February, booked 57 days in advance, depart on a Tuesday or Monday and return on a Saturday

Cheap flight deals from Oshkosh to Seattle

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

Round-trip from

$289
(Delta)

One-way from

$158
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$437
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 ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 September 17, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:23 amATW - SEA
1 stop9h 20mDelta
Tue 11/186:00 amSEA - ATW
1 stop9h 22mDelta
Deal found 9/16$289
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:35 amATW - SEA
1 stop8h 29mDelta
Tue 10/146:00 amSEA - ATW
1 stop7h 37mDelta
Deal found 9/15$314
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:13 pmATW - SEA
1 stop8h 14mAmerican Airlines
Fri 10/172:52 pmSEA - ATW
1 stop6h 51mAmerican Airlines
Deal found 9/16$315
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:00 amATW - SEA
2 stops10h 48mAmerican Airlines
Mon 10/1312:34 amSEA - ATW
1 stop6h 49mAmerican Airlines
Deal found 9/15$319
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:00 amATW - SEA
1 stop9h 45mDelta
Sat 11/156:00 amSEA - ATW
1 stop9h 31mDelta
Deal found 9/16$331
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:20 amATW - SEA
1 stop9h 25mUnited Airlines
Sat 10/47:00 amSEA - ATW
1 stop7h 49mUnited Airlines
Deal found 9/15$339
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/63:48 pmATW - SEA
1 stop9h 30mAmerican Airlines
Sun 11/912:59 amSEA - ATW
1 stop6h 17mAmerican Airlines
Deal found 9/16$340
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:00 amATW - SEA
1 stop9h 45mDelta
Sat 11/1511:55 pmSEA - ATW
1 stop19h 12mDelta
Deal found 9/16$347
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/302:32 pmATW - SEA
2 stops10h 43mUnited Airlines
Mon 11/312:35 pmSEA - ATW
1 stop6h 58mUnited Airlines
Deal found 9/15$351
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:25 pmATW - SEA
1 stop6h 55mUnited Airlines
Wed 10/86:35 amSEA - ATW
2 stops10h 53mUnited Airlines
Deal found 9/16$353

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 September 17, 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

Sat 10/25

4:17 pm-8:20 pm

1 stop6h 03m

Seattle/Tacoma Intl

Sun 11/9

6:00 am-5:22 pm

1 stop9h 22m

$289

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Thu 11/6

3:48 pm-11:18 pm

1 stop9h 30m

Seattle/Tacoma Intl

Mon 11/10

2:46 pm-11:33 pm

1 stop6h 47m

$289

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 10/31

5:41 am-2:01 pm

1 stop10h 20m

Seattle/Tacoma Intl

Wed 11/5

6:00 am-4:47 pm

1 stop8h 47m

$289

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sat 11/15

5:23 am-12:43 pm

1 stop9h 20m

Seattle/Tacoma Intl

Tue 11/18

6:00 am-5:22 pm

1 stop9h 22m

$289

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sat 11/15

11:08 am-6:40 pm

1 stop9h 32m

Seattle/Tacoma Intl

Mon 11/17

6:00 am-5:22 pm

1 stop9h 22m

$289

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 12/12

5:20 pm-10:28 pm

1 stop7h 08m

Seattle/Tacoma Intl

Sun 12/14

7:00 am-4:42 pm

1 stop7h 42m

$314

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Fri 10/3

9:36 am-1:59 pm

1 stop6h 23m

Seattle/Tacoma Intl

Sun 10/5

12:34 am-9:23 am

1 stop6h 49m

$314

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 10/14

6:13 pm-12:27 am

1 stop8h 14m

Seattle/Tacoma Intl

Fri 10/17

2:52 pm-11:43 pm

1 stop6h 51m

$315

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 3/3

12:06 pm-4:19 pm

1 stop6h 13m

Seattle/Tacoma Intl

Wed 3/4

12:00 pm-9:39 pm

1 stop7h 39m

$315

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 9/30

6:00 am-2:48 pm

2 stops10h 48m

Seattle/Tacoma Intl

Mon 10/13

12:34 am-9:23 am

1 stop6h 49m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 22 results
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, January is the cheapest month in which you can book a flight from Oshkosh to Seattle (average of $238). Flying from Oshkosh to Seattle in June is currently the most expensive (average of $387). 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 September 17, 2025.

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.

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 Tuesday afternoons when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 17, 2025.

The most flights from OS9 to SEA are scheduled on a Monday (14 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (5 on average).

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 September 17, 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
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 25 times in the past calendar month.

  • How long is the flight from Oshkosh to Seattle?

    Delta and American Airlines can get you from Oshkosh to Seattle in just under 6h 03m. Your travel time can differ by up to 3h 27m. 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 $158. American Airlines flights start at $158 while deals on Delta start at $187 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 (92%), American Airlines (86%) or Alaska Airlines (86%) 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 $747, our data shows the cheapest flight currently is $148. When looking at the most popular route, (Appleton Intl - Seattle/Tacoma Intl), you can expect to pay $289 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, January is the cheapest month in which you can book a flight from Oshkosh to Seattle (average of $238). Flying from Oshkosh to Seattle in June is currently the most expensive (average of $387). 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
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Oshkosh to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Seattle flights
Minneapolis to Seattle flights
O'Hare Intl to Portland flights
Milwaukee to Seattle flights
Minneapolis to Portland flights
Minneapolis to Spokane flights
Madison to Seattle flights
Madison to Portland flights
O'Hare Intl to Spokane flights
Appleton to Portland flights
Milwaukee to Portland flights
Minneapolis to Pasco flights
Appleton to Seattle flights
Green Bay to Seattle flights
Wausau to Seattle flights
Milwaukee to Spokane flights
O'Hare Intl to Pasco flights
Madison to Spokane flights
Green Bay to Portland flights
Duluth to Seattle flights
Appleton to Spokane flights
Eau Claire to Portland flights
O'Hare Intl to Bellingham flights
O'Hare Intl to Walla Walla flights
Duluth to Portland flights
O'Hare Intl to Pullman flights
La Crosse to Seattle flights
Wausau to Spokane flights
Wausau to Portland flights
Rhinelander to Seattle flights
La Crosse to Portland flights
Minneapolis to Walla Walla flights
Duluth to Spokane flights
O'Hare Intl to Yakima flights
Green Bay to Spokane flights
O'Hare Intl to Wenatchee flights
Milwaukee to Pasco flights
Minneapolis to Bellingham flights
Milwaukee to Bellingham flights
Minneapolis to Pullman flights
Minneapolis to Yakima flights
Madison to Pasco flights
Milwaukee to Pullman flights
Milwaukee to Yakima flights
Madison to Walla Walla flights
La Crosse to Spokane flights
Madison to Yakima flights

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$122Average$290FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$137Average$374FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$176Average$395FlexibilityNo cancel feeOn-time63%
DeltaCheapest$179Average$426FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$213Average$485FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$230Average$457FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$257Average$402FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$257Average$477FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.