What is the cheapest airline that flies from Waterloo to Seattle/Tacoma Intl?

American Airlines is the most popular carrier operating from Waterloo to Seattle/Tacoma Intl

What airlines fly to Seattle?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Seattle from Waterloo, Iowa according to our data. American Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Waterloo Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Waterloo Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Waterloo Airport to Seattle/Tacoma Intl Airport?

The number of operators available for flights from Waterloo Airport to Seattle/Tacoma Intl Airport is 1 as of March 2026.

How old do you have to be to fly from Waterloo Airport to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Waterloo Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$324 Cheap Flights from Waterloo to Seattle in 2026

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Find the cheapest flights from Waterloo, Iowa to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:23 pm - 10:38 pm

ALO

SEA

10h 15m

1 stop

3:17 pm - 11:49 pm

SEA

ALO

6h 32m

1 stop

$355American Airlines

Wed, Apr 29 - Mon, May 4

2:23 pm - 10:38 pm

ALO

SEA

10h 15m

1 stop

11:55 pm - 1:53 pm

SEA

ALO

11h 58m

2 stops

$360American Airlines

Wed, Apr 29 - Mon, May 4

2:23 pm - 10:47 pm

ALO

SEA

10h 24m

2 stops

12:59 am - 1:53 pm

SEA

ALO

10h 54m

2 stops

$365American Airlines

Tue, Apr 21 - Mon, Apr 27

5:40 am - 12:29 pm

ALO

SEA

8h 49m

1 stop

1:19 pm - 11:49 pm

SEA

ALO

8h 30m

1 stop

$457American Airlines

Thu, Apr 9 - Mon, Apr 13

5:40 am - 12:29 pm

ALO

SEA

8h 49m

1 stop

11:55 pm - 1:53 pm

SEA

ALO

11h 58m

2 stops

$462American Airlines

Thu, Apr 9 - Mon, Apr 13

2:23 pm - 10:58 pm

ALO

SEA

10h 35m

2 stops

11:55 pm - 1:53 pm

SEA

ALO

11h 58m

2 stops

$467American Airlines

Wed, Apr 29 - Mon, May 4

3:22 pm - 8:37 pm

ALO

SEA

7h 15m

1 stop

10:22 am - 11:59 pm

SEA

ALO

11h 37m

2 stops

$644American Airlines

Fri, Jul 24 - Sat, Aug 1

3:22 pm - 8:37 pm

ALO

SEA

7h 15m

1 stop

3:06 pm - 11:59 pm

SEA

ALO

6h 53m

1 stop

$646American Airlines

Fri, Jul 24 - Sat, Aug 1

5:00 am - 1:48 pm

ALO

SEA

10h 48m

2 stops

10:22 am - 11:59 pm

SEA

ALO

11h 37m

2 stops

$649American Airlines

Fri, Jul 24 - Sat, Aug 1

2:23 pm - 10:14 am

ALO

SEA

21h 51m

1 stop

11:33 pm - 1:53 pm

SEA

ALO

12h 20m

1 stop

$675American Airlines

Mon, Apr 27 - Fri, May 1

American Airlines flights from Waterloo, Iowa to Seattle

Our best American Airlines deals on Waterloo, Iowa to Seattle flight tickets

American Airlines

Apr 29

ALO2:23 pmWaterloo

10h 15m

1 stop

SEA10:38 pmSeattle/Tacoma Intl

May 4

SEA3:17 pmSeattle/Tacoma Intl

6h 32m

1 stop

ALO11:49 pmWaterloo

$355

American Airlines

Apr 29

ALO2:23 pmWaterloo

10h 15m

1 stop

SEA10:38 pmSeattle/Tacoma Intl

May 4

SEA11:55 pmSeattle/Tacoma Intl

11h 58m

2 stops

ALO1:53 pmWaterloo

$360

American Airlines

Apr 21

ALO2:23 pmWaterloo

10h 24m

2 stops

SEA10:47 pmSeattle/Tacoma Intl

Apr 27

SEA12:59 amSeattle/Tacoma Intl

10h 54m

2 stops

ALO1:53 pmWaterloo

$365

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Wed 4/29

2:23 pm-10:38 pm

1 stop10h 15m

Seattle/Tacoma Intl

Mon 5/4

3:17 pm-11:49 pm

1 stop6h 32m

$355

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Wed 4/29

2:23 pm-10:38 pm

1 stop10h 15m

Seattle/Tacoma Intl

Mon 5/4

11:55 pm-1:53 pm

2 stops11h 58m

$360

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Tue 4/21

2:23 pm-10:47 pm

2 stops10h 24m

Seattle/Tacoma Intl

Mon 4/27

12:59 am-1:53 pm

2 stops10h 54m

$365

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Thu 4/9

5:40 am-12:29 pm

1 stop8h 49m

Seattle/Tacoma Intl

Mon 4/13

1:19 pm-11:49 pm

1 stop8h 30m

$457

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Thu 4/9

5:40 am-12:29 pm

1 stop8h 49m

Seattle/Tacoma Intl

Mon 4/13

11:55 pm-1:53 pm

2 stops11h 58m

$462

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Wed 4/29

2:23 pm-10:58 pm

2 stops10h 35m

Seattle/Tacoma Intl

Mon 5/4

11:55 pm-1:53 pm

2 stops11h 58m

$467

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Fri 7/24

3:22 pm-8:37 pm

1 stop7h 15m

Seattle/Tacoma Intl

Sat 8/1

10:22 am-11:59 pm

2 stops11h 37m

$644

Quickest round-trip

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Fri 7/24

3:22 pm-8:37 pm

1 stop7h 15m

Seattle/Tacoma Intl

Sat 8/1

3:06 pm-11:59 pm

1 stop6h 53m

$646

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Fri 7/24

5:00 am-1:48 pm

2 stops10h 48m

Seattle/Tacoma Intl

Sat 8/1

10:22 am-11:59 pm

2 stops11h 37m

$649

WaterlooSeattle

ALO - SEA

ALOSEA

Waterloo

Mon 4/27

2:23 pm-10:14 am

1 stop21h 51m

Seattle/Tacoma Intl

Fri 5/1

11:33 pm-1:53 pm

1 stop12h 20m

$675

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first

How to get the cheapest flight ticket from Waterloo, Iowa to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Can stopping save me money on Waterloo, Iowa to Seattle flights?

You could potentially save up to 8% on your flight if you consider stops on a Waterloo, Iowa to Seattle flight.

When to book flights from Waterloo, Iowa to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Waterloo, Iowa to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Waterloo, Iowa to Seattle (ALO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Waterloo, Iowa to Seattle

Fastest flight time	7h 15m
Direct flights	None

The fastest flight from Waterloo, Iowa to Seattle takes 7h 15m

There are no direct flights from Waterloo, Iowa to Seattle. There are no popular flight routes from Waterloo, Iowa to Seattle.

Search flight deals

How far is Waterloo to Seattle/Tacoma Intl by plane?
There are 1495.1 mi between Waterloo and Seattle/Tacoma Intl. Flights usually cover this in 7h 15m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Waterloo Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Waterloo Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Waterloo Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Waterloo Airport to Seattle/Tacoma Intl Airport is 1 as of March 2026.
How old do you have to be to fly from Waterloo Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Waterloo Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Waterloo, Iowa to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Waterloo, Iowa to Seattle is American Airlines (100% of total bookings).

Best airlines flying from Waterloo, Iowa to Seattle

Compare and see reviews for airlines that fly from Waterloo, Iowa to Seattle with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $288	Free Cancellation	Rating 7.1 11,496 reviews		Search American Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Puyallup

Lakewood

Cle Elum

Tukwila

Federal Way

Centralia

Fife

Westport

Kirkland

Tumwater

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Can I find flights from Waterloo to Seattle with flexible booking policies on momondo?

All flight searches from Waterloo to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Waterloo to Seattle?

momondo helps you find the best flight between Waterloo and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Waterloo to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Waterloo and alert you when they change.