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Waterloo

$333+ Cheap flights from Seattle to Waterloo, IA (SEA - ALO)

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ALO
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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Cheap flight deals from Seattle to Waterloo

Cheapest flights from Seattle to Waterloo
Explore the most affordable flight options available from Seattle to Waterloo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 11, 2026.

This American Airlines deal was found by Cheapflights users on 3/7. 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 4/213:17 pm
SEA
-
ALO
1 stop6h 32m
American Airlines
Tue 4/282:23 pm
ALO
-
SEA
1 stop10h 15m
American Airlines
Deal found 3/7$333
This American Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 5/233:08 pm
SEA
-
ALO
1 stop7h 01m
American Airlines
Mon 5/255:00 am
ALO
-
SEA
1 stop9h 56m
American Airlines
Deal found 3/7$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 7/83:06 pm
SEA
-
ALO
1 stop6h 53m
American Airlines
Sun 7/123:26 pm
ALO
-
SEA
1 stop10h 09m
American Airlines
Deal found 3/11$539
This American Airlines deal was found by Cheapflights users on 3/9. 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 4/611:59 pm
SEA
-
ALO
2 stops11h 54m
American Airlines
Mon 4/135:40 am
ALO
-
SEA
1 stop8h 49m
American Airlines
Deal found 3/9$624

Find flight deals from Seattle to Waterloo

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Waterloo (ALO). 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 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$333
(American Airlines)
Provider with most accurate pricing for Seattle/Tacoma Intl-Waterloo flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Waterloo flights.
Search Deals
From Seattle/Tacoma Intl to Waterloo
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Waterloo 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 11, 2026.
Use the filters below to find and compare flights from Seattle to Waterloo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Tue 4/21

3:17 pm-11:49 pm

1 stop6h 32m

Waterloo

Tue 4/28

2:23 pm-10:38 pm

1 stop10h 15m

$333

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Sat 5/23

3:08 pm-12:09 am

1 stop7h 01m

Waterloo

Mon 5/25

5:00 am-2:55 pm

2 stops11h 55m

$524

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Wed 7/8

3:06 pm-11:59 pm

1 stop6h 53m

Waterloo

Sun 7/12

3:26 pm-11:35 pm

1 stop10h 09m

$539

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Mon 4/6

11:59 pm-1:53 pm

2 stops11h 54m

Waterloo

Mon 4/13

5:40 am-12:29 pm

1 stop8h 49m

$624

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Sat 3/21

11:59 pm-2:40 pm

2 stops12h 41m

Waterloo

Wed 3/25

5:20 am-12:47 pm

1 stop9h 27m

$1,012
Cheapest one-way
Quickest one-way

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Tue 3/31

1:37 pm-11:53 pm

1 stop8h 16m

$442

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Wed 4/1

1:37 pm-11:53 pm

1 stop8h 16m

$442

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Sun 3/29

1:37 pm-11:53 pm

1 stop8h 16m

$494

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Thu 4/2

1:37 pm-11:53 pm

1 stop8h 16m

$620

SeattleWaterloo

SEA - ALO

SEAALO

Seattle/Tacoma Intl

Sat 4/4

7:21 am-11:53 pm

1 stop14h 32m

$738

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

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

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

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

Currently, April is the cheapest month in which you can book a flight from Seattle to Waterloo, Iowa (average of $162). Flying from Seattle to Waterloo, Iowa in December is currently the most expensive (average of $362). 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

Find useful and relevant information for your journey from Seattle to Waterloo. 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 Seattle to Waterloo, Iowa?

    A quick flight from Seattle to Waterloo, Iowa can take about 6h 32m. American Airlines provides one of the quickest options available for as low as $333. Seattle and Waterloo, Iowa are separated by a distance of 1489 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Waterloo 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 Seattle to Waterloo, Iowa?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Waterloo, Iowa (average of $162). Flying from Seattle to Waterloo, Iowa in December is currently the most expensive (average of $362). 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 Waterloo?

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