In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

What is the cheapest time of day to fly from UIN to SEA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Quincy, Illinois to Seattle as you normally would.

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.

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.

$672+ Cheap Flights from Quincy, IL to Seattle

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Cheap flight deals from Quincy to Seattle

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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 February 25, 2026.

Tue 3/109:35 am

UIN

SEA

1 stop11h 05m

Multiple Airlines

Sat 3/1410:48 pm

SEA

UIN

2 stops15h 12m

Multiple Airlines

Deal found 2/23

$672

Find flight deals from Quincy to Seattle

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$672 (Expedia)

Provider with most accurate pricing for Quincy Regional-Seattle/Tacoma Intl flight deals.

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Price

QuincySeattle

UIN - SEA

UINSEA

Quincy Regional

Tue 3/10

9:35 am-6:40 pm

1 stop11h 05m

Seattle/Tacoma Intl

Sat 3/14

10:48 pm-4:00 pm

2 stops15h 12m

$672

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

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.

UIN-SEA

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, March is the cheapest month in which you can book a flight from Quincy, Illinois to Seattle (average of $124). Flying from Quincy, Illinois to Seattle in August is currently the most expensive (average of $222). 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

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, March is the cheapest month in which you can book a flight from Quincy, Illinois to Seattle (average of $124). Flying from Quincy, Illinois to Seattle in August is currently the most expensive (average of $222). 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.

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$672+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Quincy to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Quincy to Seattle

Cheapest flights from Quincy to SeattleExplore 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 February 25, 2026.

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 February 25, 2026.

Best flights from Quincy to SeattleDiscover carefully curated flight deals from Quincy to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 25, 2026.

Discover carefully curated flight deals from Quincy to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 25, 2026.

Last-minute flights from Quincy to SeattleDiscover last-minute flight deals from Quincy to Seattle. Data last updated February 25, 2026 and is based on user searches.

Discover last-minute flight deals from Quincy to Seattle. Data last updated February 25, 2026 and is based on user searches.

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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.

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?

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?

How can I find direct flights from Quincy to Seattle?

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

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

Traveling to a place near Seattle?

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Quincy and Seattle flights

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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 February 25, 2026.

Best flights from Quincy to Seattle
Discover carefully curated flight deals from Quincy to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 25, 2026.

Last-minute flights from Quincy to Seattle
Discover last-minute flight deals from Quincy to Seattle. Data last updated February 25, 2026 and is based on user searches.