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$426+ Cheap flights from Quincy, IL to Seattle (UIN - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
UIN — SEA
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Quincy to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Quincy (UIN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 18, 2025.

Round-trip from

$426
(KAYAK)
From Quincy Regional to Seattle/Tacoma Intl
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Find flight deals from Quincy to Seattle

Cheapest flights from Quincy to Seattle
Explore the most affordable flight options available from Quincy to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Expedia deal was found by Cheapflights users on 8/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/210:35 amUIN - SEA
1 stop9h 17mMultiple Airlines
Fri 9/512:59 amSEA - UIN
1 stop7h 00mMultiple Airlines
Deal found 8/18$502

Cheapflights Fare Finder

 
Customize your flight search to find flights from Quincy 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 18, 2025.
Use the filters below to find and compare flights from Quincy to Seattle that are best for you.

Fly from

Quincy

Fly to

Seattle

Route

Depart

Return

Price

QuincySeattle

UIN - SEA

UINSEA

Quincy Regional

Wed 1/21

11:10 am-5:21 pm

1 stop8h 11m

Seattle/Tacoma Intl

Thu 1/22

8:00 am-10:11 am

1 stop24h 11m

$426

QuincySeattle

UIN - SEA

UINSEA

Quincy Regional

Tue 9/2

10:35 am-5:52 pm

1 stop9h 17m

Seattle/Tacoma Intl

Fri 9/5

12:59 am-9:59 am

1 stop7h 00m

$502

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Best time to book a flight from Quincy to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Quincy 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 Quincy to Seattle

What is the cheapest month to book a flight from Quincy, Illinois to Seattle?

Currently, January is the cheapest month in which you can book a flight from Quincy, Illinois to Seattle (average of $238). Flying from Quincy, Illinois to Seattle in June is currently the most expensive (average of $388). 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.

Related info for your journey

Find useful and relevant information for your journey from Quincy to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Quincy to Seattle that include hotel bookings?

    Yes. In addition to deals on Quincy to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Quincy to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Quincy to Seattle.

  • Can I find deals for business class flights from Quincy to Seattle?

    Yes. Cheapflights offers flight deals from Quincy 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 Quincy, Illinois to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Quincy, Illinois to Seattle (average of $238). Flying from Quincy, Illinois to Seattle in June is currently the most expensive (average of $388). 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
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Lakewood
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Leavenworth
Renton
Olympia
Puyallup
Kent
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Federal Way
Shelton

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