HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$355+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SEA
Apr 13 — Apr 201
Mon 4/13
Mon 4/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Waterloo to Seattle with Cheapflights

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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 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 March 14, 2026.

This American Airlines deal was found by Cheapflights users on 3/12. 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 4/282:23 pm
ALO
-
SEA
1 stop10h 15m
American Airlines
Tue 5/53:17 pm
SEA
-
ALO
1 stop6h 32m
American Airlines
Deal found 3/12$355
This American Airlines deal was found by Cheapflights users on 3/12. 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 4/282:23 pm
ALO
-
SEA
2 stops10h 35m
American Airlines
Mon 5/43:17 pm
SEA
-
ALO
1 stop6h 32m
American Airlines
Deal found 3/12$360
This American Airlines deal was found by Cheapflights users on 3/12. 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 4/222:23 pm
ALO
-
SEA
2 stops12h 21m
American Airlines
Wed 4/2911:55 pm
SEA
-
ALO
2 stops11h 58m
American Airlines
Deal found 3/12$467
This American Airlines deal was found by Cheapflights users on 3/12. 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 4/275:40 am
ALO
-
SEA
1 stop8h 49m
American Airlines
Sat 5/21:19 pm
SEA
-
ALO
1 stop8h 30m
American Airlines
Deal found 3/12$497
This American Airlines deal was found by Cheapflights users on 3/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:00 am
ALO
-
SEA
1 stop6h 29m
American Airlines
Sun 8/23:06 pm
SEA
-
ALO
1 stop6h 53m
American Airlines
Deal found 3/11$517
This American Airlines deal was found by Cheapflights users on 3/14. 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 6/295:00 am
ALO
-
SEA
1 stop9h 56m
American Airlines
Tue 7/71:39 pm
SEA
-
ALO
1 stop8h 20m
American Airlines
Deal found 3/14$927

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 March 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$355
(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
Search Deals

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 March 14, 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 4/22

2:23 pm-10:38 pm

1 stop10h 15m

Seattle/Tacoma Intl

Wed 4/29

11:41 am-11:49 pm

2 stops10h 08m

$360

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Wed 4/29

2:23 pm-10:38 pm

1 stop10h 15m

Seattle/Tacoma Intl

Tue 5/5

10:25 am-11:49 pm

2 stops11h 24m

$360

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Tue 4/28

5:40 am-3:51 pm

2 stops12h 11m

Seattle/Tacoma Intl

Mon 5/4

11:55 pm-1:53 pm

2 stops11h 58m

$365

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Mon 4/27

5:40 am-12:29 pm

1 stop8h 49m

Seattle/Tacoma Intl

Sat 5/2

11:11 am-11:49 pm

2 stops10h 38m

$502
Quickest round-trip

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Wed 7/29

5:00 am-1:48 pm

2 stops10h 48m

Seattle/Tacoma Intl

Sun 8/2

3:06 pm-11:59 pm

1 stop6h 53m

$623

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Mon 6/29

5:00 am-12:56 pm

1 stop9h 56m

Seattle/Tacoma Intl

Tue 7/7

1:39 pm-11:59 pm

1 stop8h 20m

$927
Cheapest one-way
Quickest one-way

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Tue 8/4

5:00 am-12:49 pm

1 stop9h 49m

$452

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

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.

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 February is currently the most expensive (average of $350). 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 March 14, 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
11,464 reviews

Crew

7.9

Overall

7.1

Comfort

7.2

Food

6.4

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,464 reviews
American Airlines
7.1
Good
11,464 reviews

Crew

7.9

Overall

7.1

Comfort

7.2

Food

6.4

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

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 10h 15m. American Airlines provides one of the quickest options available for as low as $355. 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 February is currently the most expensive (average of $350). 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
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 March 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$422FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.