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.

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.

$544+ 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 September 10, 2026.

Mon 9/219:55 am -

1 stop26h 39m

Thu 9/2412:16 am -

1 stop11h 39m

Deal found 9/6

$734

Find flight deals from Quincy to Seattle

Round-trip from	$544 (Booking.com)

From Quincy Regional to Seattle/Tacoma Intl

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Route

Depart

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Price

Cheapest round-trip

QuincySeattle

UIN Quincy Regional - SEA Seattle/Tacoma Intl

UINSEA

Quincy Regional

Fri 3/5

9:55 am-8:37 pm

1 stop12h 42m

Seattle/Tacoma Intl

Sun 3/7

8:03 am-1:55 pm

1 stop27h 52m

$544

Quickest round-trip

QuincySeattle

UIN Quincy Regional - SEA Seattle/Tacoma Intl

UINSEA

Quincy Regional

Mon 9/21

9:55 am-10:34 am

1 stop26h 39m

Seattle/Tacoma Intl

Thu 9/24

12:16 am-1:55 pm

1 stop11h 39m

$734

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/6

Sorted by cheapest first

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.

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.

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$544+ 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 3/5. 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 September 10, 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 September 10, 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 September 10, 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 September 10, 2026.

Last-minute flights from Quincy to SeattleDiscover last-minute flight deals from Quincy to Seattle. Data last updated September 10, 2026 and is based on user searches.

Discover last-minute flight deals from Quincy to Seattle. Data last updated September 10, 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.

Related info for your journey

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?

Traveling to a place near Seattle?

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

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Search flights from Quincy to Seattle by cabin class

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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 September 10, 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 September 10, 2026.

Last-minute flights from Quincy to Seattle
Discover last-minute flight deals from Quincy to Seattle. Data last updated September 10, 2026 and is based on user searches.