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$377+ Cheap flights from Waterloo, IA to Seattle (ALO - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SEA
Aug 30 — Sep 61
Sun 8/30
Sun 9/6
1 adult, Economy
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Cheap flight deals from Waterloo to Seattle

Cheapest flights from Waterloo to Seattle
Explore the most affordable flight options available from Waterloo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2026.

This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:00 am
ALO
-
SEA
1 stop17h 15m
American Airlines
Sun 10/116:12 am
SEA
-
ALO
1 stop15h 47m
American Airlines
Deal found 7/30$539
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:00 am
ALO
-
SEA
1 stop17h 52m
American Airlines
Thu 9/311:56 pm
SEA
-
ALO
1 stop12h 56m
American Airlines
Deal found 7/30$549
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:00 am
ALO
-
SEA
1 stop17h 52m
American Airlines
Sat 8/155:50 am
SEA
-
ALO
1 stop16h 32m
American Airlines
Deal found 7/27$639
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 am
ALO
-
SEA
1 stop11h 45m
American Airlines
Thu 9/310:19 am
SEA
-
ALO
1 stop12h 03m
American Airlines
Deal found 7/30$718

Find flight deals from Waterloo to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Waterloo (ALO) 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 July 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$539
(American Airlines)

One-way from

$377
(American Airlines)
Provider with most accurate pricing for Waterloo-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Waterloo-Seattle/Tacoma Intl flights.
Search Deals
From Waterloo to Seattle/Tacoma Intl
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One-way flight from Waterloo to Seattle/Tacoma Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Waterloo 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 July 31, 2026.
Use the filters below to find and compare flights from Waterloo to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Wed 10/7

5:00 am-8:15 pm

1 stop17h 15m

Seattle/Tacoma Intl

Sun 10/11

6:12 am-11:59 pm

1 stop15h 47m

$549

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Thu 8/27

5:00 am-8:52 pm

1 stop17h 52m

Seattle/Tacoma Intl

Thu 9/3

10:19 am-12:22 am

1 stop12h 03m

$550

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Tue 8/11

5:00 am-8:52 pm

1 stop17h 52m

Seattle/Tacoma Intl

Sat 8/15

5:50 am-12:22 am

1 stop16h 32m

$639
Quickest round-trip

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Tue 9/1

5:00 am-4:41 pm

2 stops13h 41m

Seattle/Tacoma Intl

Thu 9/3

10:19 am-12:22 am

1 stop12h 03m

$748
Cheapest one-way
Quickest one-way

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Sat 8/29

5:00 am-12:13 am

1 stop21h 13m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Waterloo, Iowa-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Waterloo, Iowa-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Waterloo, Iowa-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Waterloo, Iowa-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 Waterloo, Iowa-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 Waterloo to Seattle

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 31, 2026.
Peruse reviews from past customers who have flown with American Airlines from Waterloo to Seattle to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,845 reviews

Entertainment

6.8

Comfort

7.2

Boarding

7.5

Crew

7.9

Food

6.4

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Linda,Jul 2026

ROA - CLT

Very helpful and friendly people who pushed me where I needed to go
American Airlines
7.1
Good
11,845 reviews
American Airlines
7.1
Good
11,845 reviews

Entertainment

6.8

Comfort

7.2

Boarding

7.5

Crew

7.9

Food

6.4

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Linda,Jul 2026

ROA - CLT

Very helpful and friendly people who pushed me where I needed to go

Related info for your journey

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

  • How long is the flight from Waterloo, Iowa to Seattle?

    A quick flight from Waterloo, Iowa to Seattle can take about 17h 15m. American Airlines provides one of the quickest options available for as low as $549. There are 1489 mi between Waterloo, Iowa and Seattle.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Waterloo 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Edmonds
Tukwila
Snoqualmie
Tumwater
Centralia
Puyallup
Kent
Ellensburg
Fife
Marysville
Ocean Shores
Lakewood
Lynnwood
Shoreline

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Top airline flying from Waterloo to Seattle

Discover the top airline that operate flights from Waterloo to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$350Average$598FlexibilityNo cancel feeOn-time71%

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