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?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Seattle from Waterloo, Iowa according to our data. United Airlines is the first choice among our users, with 42% 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 August 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.

$347 Cheap Flights from Waterloo, Iowa to Seattle in 2026

Discover deals from 900+ travel sites with momondo.

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.

6:07 am - 2:17 pmALO Waterloo-SEA Seattle/Tacoma Intl

10h 10m1 stop Chicago O'Hare Intl

3:14 pm - 11:51 pmSEA Seattle/Tacoma Intl-ALO Waterloo

6h 37m1 stop Chicago O'Hare Intl

$488American Airlines

Wed, Oct 7 - Sat, Oct 10

3:29 pm - 10:09 amALO Waterloo-SEA Seattle/Tacoma Intl

20h 40m1 stop Chicago O'Hare Intl

10:31 am - 11:51 pmSEA Seattle/Tacoma Intl-ALO Waterloo

11h 20m1 stop Chicago O'Hare Intl

$499American Airlines

Fri, Oct 2 - Mon, Oct 5

6:07 am - 2:17 pmALO Waterloo-SEA Seattle/Tacoma Intl

10h 10m1 stop Chicago O'Hare Intl

6:12 am - 3:09 pmSEA Seattle/Tacoma Intl-ALO Waterloo

6h 57m1 stop Chicago O'Hare Intl

$520American Airlines

Wed, Oct 7 - Sun, Oct 11

5:00 am - 3:44 pmALO Waterloo-SEA Seattle/Tacoma Intl

12h 44m1 stop Chicago O'Hare Intl

6:14 am - 11:59 pmSEA Seattle/Tacoma Intl-ALO Waterloo

15h 45m1 stop Chicago O'Hare Intl

$549American Airlines

Sat, Dec 12 - Mon, Dec 14

3:43 pm - 9:41 amALO Waterloo-SEA Seattle/Tacoma Intl

19h 58m1 stop Chicago O'Hare Intl

10:29 am - 11:59 pmSEA Seattle/Tacoma Intl-ALO Waterloo

11h 30m1 stop Chicago O'Hare Intl

$549American Airlines

Fri, Dec 11 - Mon, Dec 14

6:07 am - 12:36 amALO Waterloo-SEA Seattle/Tacoma Intl

20h 29m1 stop Chicago O'Hare Intl

6:12 am - 11:51 pmSEA Seattle/Tacoma Intl-ALO Waterloo

15h 39m1 stop Chicago O'Hare Intl

$555American Airlines

Wed, Oct 7 - Sun, Oct 11

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American Airlines flights from Waterloo, Iowa to Seattle

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

American Airlines

Oct 7

ALO6:07 amWaterloo

10h 10m

1 stop

SEA2:17 pmSeattle/Tacoma Intl

Oct 10

SEA3:14 pmSeattle/Tacoma Intl

6h 37m

1 stop

ALO11:51 pmWaterloo

$488

American Airlines

Oct 2

ALO3:29 pmWaterloo

20h 40m

1 stop

SEA10:09 amSeattle/Tacoma Intl

Oct 5

SEA10:31 amSeattle/Tacoma Intl

11h 20m

1 stop

ALO11:51 pmWaterloo

$499

American Airlines

Oct 7

ALO6:07 amWaterloo

10h 10m

1 stop

SEA2:17 pmSeattle/Tacoma Intl

Oct 11

SEA6:12 amSeattle/Tacoma Intl

6h 57m

1 stop

ALO3:09 pmWaterloo

$520

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Wed 10/7

6:07 am-2:17 pm

1 stop10h 10m

Seattle/Tacoma Intl

Sat 10/10

3:14 pm-11:51 pm

1 stop6h 37m

$488

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Fri 10/2

3:29 pm-10:09 am

1 stop20h 40m

Seattle/Tacoma Intl

Mon 10/5

10:31 am-11:51 pm

1 stop11h 20m

$499

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Wed 10/7

6:07 am-2:17 pm

1 stop10h 10m

Seattle/Tacoma Intl

Sun 10/11

6:12 am-3:09 pm

1 stop6h 57m

$520

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Sat 12/12

5:00 am-3:44 pm

1 stop12h 44m

Seattle/Tacoma Intl

Mon 12/14

6:14 am-11:59 pm

1 stop15h 45m

$549

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Fri 12/11

3:43 pm-9:41 am

1 stop19h 58m

Seattle/Tacoma Intl

Mon 12/14

10:29 am-11:59 pm

1 stop11h 30m

$549

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Wed 10/7

6:07 am-12:36 am

1 stop20h 29m

Seattle/Tacoma Intl

Sun 10/11

6:12 am-11:51 pm

1 stop15h 39m

$555

Cheapest one-way

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Fri 10/2

3:29 pm-12:50 pm

1 stop23h 21m

$347

Quickest one-way

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Sat 10/3

5:00 am-2:51 pm

1 stop11h 51m

$347

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Thu 10/1

5:00 am-9:36 pm

1 stop18h 36m

$357

WaterlooSeattle

ALO Waterloo - SEA Seattle/Tacoma Intl

ALOSEA

Waterloo

Thu 10/1

5:00 am-9:52 pm

2 stops18h 52m

$373

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 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 32% 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

Best Price Found	$347
Fastest flight time	10h 10m
Direct flights	None

The best one-way flight to Seattle from Waterloo, Iowa in the past 72 hours is $347. The best round-trip flight deal from Waterloo, Iowa to Seattle found on momondo in the last 72 hours is $488.

The fastest flight from Waterloo, Iowa to Seattle takes 10h 10m

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

Search flight deals

Frequently asked questions about flying from Waterloo, Iowa to Seattle

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 10h 10m, 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 August 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 $350	Free Cancellation	Rating 7.1 12,021 reviews		Search American Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Kent

Olympia

Redmond

Lakewood

Federal Way

Fife

Tukwila

Puyallup

Lynnwood

Cle Elum

Marysville

Kirkland

Centralia

Lacey

Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Waterloo to Seattle?

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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.