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$148+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SEA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 40 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 July 31, 2025.

Round-trip from

$289
(Delta)

One-way from

$148
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$614
From Oshkosh to Seattle/Tacoma Intl
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One-way flight from Oshkosh to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 17% potential increase in price ($95 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 31, 2025.

This American Airlines deal was found by Cheapflights users on 7/31. 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 10/153:22 pmATW - SEA
1 stop8h 56mAmerican Airlines
Fri 10/1712:34 amSEA - ATW
1 stop6h 49mAmerican Airlines
Deal found 7/31$289
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/132:41 pmATW - SEA
1 stop9h 39mUnited Airlines
Tue 9/237:00 amSEA - ATW
1 stop7h 49mUnited Airlines
Deal found 7/29$299
This Delta deal was found by Cheapflights users on 7/31. 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 10/305:42 amATW - SEA
1 stop10h 19mDelta
Wed 11/56:00 amSEA - ATW
1 stop8h 59mDelta
Deal found 7/31$303

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 July 31, 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

Wed 10/15

3:22 pm-10:18 pm

1 stop8h 56m

Seattle/Tacoma Intl

Fri 10/17

12:34 am-9:23 am

1 stop6h 49m

$289

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Sat 9/13

2:41 pm-10:20 pm

1 stop9h 39m

Seattle/Tacoma Intl

Tue 9/23

7:00 am-4:49 pm

1 stop7h 49m

$299

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Thu 10/30

5:42 am-2:01 pm

1 stop10h 19m

Seattle/Tacoma Intl

Wed 11/5

6:00 am-4:59 pm

1 stop8h 59m

$303

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Wed 10/15

3:22 pm-10:18 pm

1 stop8h 56m

$148

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Tue 10/21

4:17 pm-8:20 pm

1 stop6h 03m

$189

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Wed 10/15

2:45 pm-11:29 pm

2 stops10h 44m

$247

AppletonSeattle

ATW - SEA

ATWSEA

Appleton Intl

Thu 8/21

1:05 pm-7:58 am

2 stops20h 53m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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

How far ahead should I book a flight from Oshkosh to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Oshkosh to Seattle. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from Oshkosh to Seattle, you should look to book at least 40 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $389). 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 July 31, 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 July 31, 2025.

The most flights from OS9 to SEA are scheduled on a Wednesday (11 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (7 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 July 31, 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
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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
7,981 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

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 26 times in the past calendar month.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $148. Delta flights start at $189 while deals on United Airlines start at $193 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 (94%), Air Tahiti Nui (91%) 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 $895, 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 $389). 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
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$122Average$287FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$137Average$350FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$176Average$399FlexibilityNo cancel feeOn-time63%
DeltaCheapest$177Average$429FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$221Average$490FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$230Average$461FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$257Average$399FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$257Average$474FlexibilityNo cancel feeOn-time75%

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