$322+ Cheap flights from Seattle to Quincy, IL (SEA - UIN)
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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — UIN
Oct 14 — Oct 211
Round-trip
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Quincy
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to QuincyExplore the most affordable flight options available from Seattle to Quincy. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
Explore the most affordable flight options available from Seattle to Quincy. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:51 pm -
1 stop18h 04m
Wed 9/309:55 am -
1 stop10h 30m
Deal found 9/11![Multiple Airlines logo]()
$734
Best flights from Seattle to QuincyDiscover carefully curated flight deals from Seattle to Quincy that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
Discover carefully curated flight deals from Seattle to Quincy that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:51 pm -
1 stop18h 04m
Wed 9/309:55 am -
1 stop10h 30m
Deal found 9/11![Multiple Airlines logo]()
$734
Last-minute flights from Seattle to QuincyDiscover last-minute flight deals from Seattle to Quincy. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Quincy. Data last updated September 14, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:51 pm -
1 stop18h 04m
Wed 9/309:55 am -
1 stop10h 30m
Deal found 9/11![Multiple Airlines logo]()
$734
One-way flights from Seattle to QuincySearch for one-way flight options from Seattle to Quincy. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
Search for one-way flight options from Seattle to Quincy. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sun 9/209:45 pm -
2 stops38h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$322
Find flight deals from Seattle to Quincy
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Quincy (UIN). 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 September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $734 (Booking.com) |
One-way from | $322 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Quincy 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 7,457,451 searches. Data last updated September 14, 2026.
Use the filters below to find and compare flights from Seattle to Quincy that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleQuincy
SEA Seattle/Tacoma Intl - UIN Quincy Regional
SEAUIN
Seattle/Tacoma Intl
Sun 9/20
9:45 pm-1:55 pm
2 stops38h 10m
Quincy Regional
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$322
Quickest round-trip
SeattleQuincy
SEA Seattle/Tacoma Intl - UIN Quincy Regional
SEAUIN
Seattle/Tacoma Intl
Sat 9/26
5:51 pm-1:55 pm
1 stop18h 04m
Quincy Regional
Wed 9/30
9:55 am-6:25 pm
1 stop10h 30m
$734
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Seattle-Quincy, Illinois flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Quincy, Illinois flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Quincy, Illinois flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Quincy, Illinois 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 Seattle-Quincy, Illinois 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 Seattle to Quincy
Have a flexible travel schedule? Discover the best time to fly to Quincy from Seattle with our price prediction graph.
SEA-UIN
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.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Quincy. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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