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$315+ Cheap flights from Waterloo, IA to Seattle (ALO - 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SEA
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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 January 27, 2026.

This American Airlines deal was found by Cheapflights users on 1/24. 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.
Mon 2/163:15 pm
ALO
-
SEA
1 stop9h 49m
American Airlines
Sun 2/221:37 pm
SEA
-
ALO
1 stop8h 16m
American Airlines
Deal found 1/24$315
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Sun 3/15:20 am
ALO
-
SEA
2 stops12h 37m
American Airlines
Tue 3/3111:59 pm
SEA
-
ALO
2 stops12h 41m
American Airlines
Deal found 1/27$490
This American Airlines deal was found by Cheapflights users on 1/26. 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 2/106:00 am
ALO
-
SEA
1 stop9h 08m
American Airlines
Sat 2/1411:57 pm
SEA
-
ALO
2 stops12h 48m
American Airlines
Deal found 1/26$590
This American Airlines deal was found by Cheapflights users on 1/25. 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.
Mon 6/293:09 pm
ALO
-
SEA
1 stop7h 22m
American Airlines
Tue 7/76:00 am
SEA
-
ALO
1 stop6h 39m
American Airlines
Deal found 1/25$909
This American Airlines deal was found by Cheapflights users on 1/25. 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.
Mon 2/96:00 am
ALO
-
SEA
1 stop8h 01m
American Airlines
Fri 2/131:37 pm
SEA
-
ALO
1 stop8h 16m
American Airlines
Deal found 1/25$967

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$315
(American Airlines)
Provider with most accurate pricing for Waterloo-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Waterloo-Seattle/Tacoma Intl flights.
Search Deals
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 January 27, 2026.
Use the filters below to find and compare flights from Waterloo to Seattle that are best for you.

Fly from

Waterloo

Fly to

Seattle

Route

Depart

Return

Price

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Mon 2/16

3:15 pm-11:04 pm

1 stop9h 49m

Seattle/Tacoma Intl

Sun 2/22

1:37 pm-11:53 pm

1 stop8h 16m

$315

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Sun 3/1

3:15 pm-11:04 pm

1 stop9h 49m

Seattle/Tacoma Intl

Tue 3/31

1:37 pm-11:53 pm

1 stop8h 16m

$315

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Tue 2/10

6:00 am-1:08 pm

1 stop9h 08m

Seattle/Tacoma Intl

Sat 2/14

11:57 pm-2:45 pm

2 stops12h 48m

$590

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Mon 2/9

6:00 am-12:01 pm

1 stop8h 01m

Seattle/Tacoma Intl

Fri 2/13

1:37 pm-11:53 pm

1 stop8h 16m

$967

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

  • 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.

Cheapflights Insights

Everything you need to know about your flight from Waterloo to Seattle

What is the cheapest month to book a flight from Waterloo, Iowa to Seattle?

Currently, April is the cheapest month in which you can book a flight from Waterloo, Iowa to Seattle (average of $131). Flying from Waterloo, Iowa to Seattle in September is currently the most expensive (average of $288). 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.

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 January 27, 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
7.2
Good
11,197 reviews

Overall

7.2

Food

6.4

Crew

8.0

Entertainment

6.9

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,197 reviews
American Airlines
7.2
Good
11,197 reviews

Overall

7.2

Food

6.4

Crew

8.0

Entertainment

6.9

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

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 9h 49m. American Airlines provides one of the quickest options available for as low as $315. There are 1489 mi between Waterloo, Iowa and Seattle.

  • What is the cheapest airline to fly from Waterloo, Iowa to Seattle round-trip?

    Our cheapest airline available from Waterloo, Iowa to Seattle is American Airlines. Our recent data shows that you can find tickets from as low as $288 on this airline.

  • 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.

  • What is the cheapest month to book a flight from Waterloo, Iowa to Seattle?

    Currently, April is the cheapest month in which you can book a flight from Waterloo, Iowa to Seattle (average of $131). Flying from Waterloo, Iowa to Seattle in September is currently the most expensive (average of $288). 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
Tacoma
SeaTac
Lakewood
Ocean Shores
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Lacey
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Renton
Puyallup
Kirkland
Kent
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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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$422FlexibilityNo cancel feeOn-time71%

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