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$653+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
UIN — SEA
May 12 — May 191
Tue 5/12
Tue 5/19
1 adult, Economy
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Cheap 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 April 12, 2026.

This Expedia deal was found by Cheapflights users on 4/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:45 am
UIN
-
SEA
2 stops15h 08m
Multiple Airlines
Wed 4/2910:32 am
SEA
-
UIN
1 stop8h 28m
Multiple Airlines
Deal found 4/10$653
This Expedia deal was found by Cheapflights users on 4/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:25 pm
UIN
-
SEA
1 stop8h 04m
Multiple Airlines
Mon 4/2710:32 am
SEA
-
UIN
1 stop8h 28m
Multiple Airlines
Deal found 4/8$673

Find 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 April 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$653
(Expedia)
Provider with most accurate pricing for Quincy Regional-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Quincy Regional-Seattle/Tacoma Intl flights.
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From Quincy Regional to Seattle/Tacoma Intl
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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 April 12, 2026.
Use the filters below to find and compare flights from Quincy to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

QuincySeattle

UIN - SEA

UINSEA

Quincy Regional

Sat 4/25

9:45 am-10:53 pm

2 stops15h 08m

Seattle/Tacoma Intl

Wed 4/29

10:32 am-9:00 pm

1 stop8h 28m

$653
Quickest round-trip

QuincySeattle

UIN - SEA

UINSEA

Quincy Regional

Thu 4/23

5:25 pm-11:29 pm

1 stop8h 04m

Seattle/Tacoma Intl

Mon 4/27

10:32 am-9:00 pm

1 stop8h 28m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Quincy, Illinois-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Quincy, Illinois-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Quincy, Illinois-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Quincy, Illinois-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Quincy, Illinois-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, May is the cheapest month in which you can book a flight from Quincy, Illinois to Seattle (average of $104). Flying from Quincy, Illinois to Seattle in August is currently the most expensive (average of $231). 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, May is the cheapest month in which you can book a flight from Quincy, Illinois to Seattle (average of $104). Flying from Quincy, Illinois to Seattle in August is currently the most expensive (average of $231). 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
Tacoma
Ocean Shores
Olympia
Kent
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Lacey
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Leavenworth
Snoqualmie
Tumwater
Tukwila
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