$426+ Cheap flights from Waterloo, IA to Seattle (ALO - SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
ALO — SEA
Jul 17 — Jul 241
Round-trip
1 adult, Economy
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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
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Cheapest flights from Waterloo to SeattleExplore 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 June 17, 2026.
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 June 17, 2026.
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/223:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Wed 7/293:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/16![American Airlines logo]()
$478
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 7/163:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Wed 7/222:09 pm
SEA
- ALO
1 stop8h 20m
American Airlines
Deal found 6/16![American Airlines logo]()
$510
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/145:06 am
ALO
- SEA
1 stop10h 13m
American Airlines
Tue 7/212:09 pm
SEA
- ALO
1 stop8h 20m
American Airlines
Deal found 6/16![American Airlines logo]()
$516
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 8/203:23 pm
ALO
- SEA
1 stop7h 29m
American Airlines
Thu 8/275:50 am
SEA
- ALO
1 stop7h 02m
American Airlines
Deal found 6/16![American Airlines logo]()
$542
This American Airlines deal was found by Cheapflights users on 6/15. 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 stop11h 15m
American Airlines
Tue 7/76:00 am
SEA
- ALO
1 stop16h 29m
American Airlines
Deal found 6/15![American Airlines logo]()
$547
This American Airlines deal was found by Cheapflights users on 6/16. 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 6/305:00 am
ALO
- SEA
2 stops13h 44m
American Airlines
Fri 7/36:00 am
SEA
- ALO
1 stop16h 29m
American Airlines
Deal found 6/16![American Airlines logo]()
$557
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Fri 7/245:06 am
ALO
- SEA
1 stop17h 31m
American Airlines
Wed 7/2911:56 pm
SEA
- ALO
1 stop12h 57m
American Airlines
Deal found 6/14![American Airlines logo]()
$559
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/215:06 am
ALO
- SEA
1 stop10h 13m
American Airlines
Tue 7/283:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/12![American Airlines logo]()
$568
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/285:06 am
ALO
- SEA
1 stop21h 46m
American Airlines
Sun 8/211:56 pm
SEA
- ALO
1 stop12h 57m
American Airlines
Deal found 6/16![American Airlines logo]()
$578
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 9/33:23 pm
ALO
- SEA
1 stop20h 06m
American Airlines
Mon 9/75:50 am
SEA
- ALO
1 stop16h 32m
American Airlines
Deal found 6/16![American Airlines logo]()
$596
Best flights from Waterloo to SeattleDiscover carefully curated flight deals from Waterloo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 17, 2026.
Discover carefully curated flight deals from Waterloo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 17, 2026.
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Wed 7/223:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Tue 7/283:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/14![American Airlines logo]()
$478
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Thu 8/203:23 pm
ALO
- SEA
1 stop7h 29m
American Airlines
Thu 8/275:50 am
SEA
- ALO
1 stop7h 02m
American Airlines
Deal found 6/13![American Airlines logo]()
$542
This American Airlines deal was found by Cheapflights users on 6/13. 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 6/293:00 pm
ALO
- SEA
1 stop11h 41m
American Airlines
Tue 7/76:00 am
SEA
- ALO
1 stop16h 29m
American Airlines
Deal found 6/13![American Airlines logo]()
$547
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Wed 7/223:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Wed 7/293:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/14![American Airlines logo]()
$568
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Wed 7/223:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Mon 7/276:00 am
SEA
- ALO
1 stop6h 53m
American Airlines
Deal found 6/14![American Airlines logo]()
$619
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 10/84:30 pm
ALO
- SEA
1 stop9h 44m
American Airlines
Sun 10/112:12 pm
SEA
- ALO
1 stop7h 07m
American Airlines
Deal found 6/16![American Airlines logo]()
$654
Last-minute flights from Waterloo to SeattleDiscover last-minute flight deals from Waterloo to Seattle. Data last updated June 17, 2026 and is based on user searches.
Discover last-minute flight deals from Waterloo to Seattle. Data last updated June 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/15. 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 stop11h 15m
American Airlines
Tue 7/76:00 am
SEA
- ALO
1 stop16h 29m
American Airlines
Deal found 6/15![American Airlines logo]()
$547
This American Airlines deal was found by Cheapflights users on 6/16. 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 6/305:00 am
ALO
- SEA
2 stops13h 44m
American Airlines
Fri 7/36:00 am
SEA
- ALO
1 stop16h 29m
American Airlines
Deal found 6/16![American Airlines logo]()
$557
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/145:06 am
ALO
- SEA
1 stop10h 13m
American Airlines
Tue 7/212:09 pm
SEA
- ALO
1 stop8h 20m
American Airlines
Deal found 6/16![American Airlines logo]()
$516
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 7/163:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Wed 7/222:09 pm
SEA
- ALO
1 stop8h 20m
American Airlines
Deal found 6/16![American Airlines logo]()
$510
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/203:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Tue 7/283:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/12![American Airlines logo]()
$600
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/215:06 am
ALO
- SEA
1 stop10h 13m
American Airlines
Tue 7/283:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/12![American Airlines logo]()
$568
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/223:23 pm
ALO
- SEA
1 stop7h 14m
American Airlines
Wed 7/293:28 pm
SEA
- ALO
1 stop7h 01m
American Airlines
Deal found 6/16![American Airlines logo]()
$478
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Fri 7/245:06 am
ALO
- SEA
1 stop17h 31m
American Airlines
Wed 7/2911:56 pm
SEA
- ALO
1 stop12h 57m
American Airlines
Deal found 6/14![American Airlines logo]()
$559
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Fri 7/245:06 am
ALO
- SEA
1 stop17h 31m
American Airlines
Mon 7/276:00 am
SEA
- ALO
1 stop16h 29m
American Airlines
Deal found 6/12![American Airlines logo]()
$598
This American Airlines deal was found by Cheapflights users on 6/16. 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 7/285:06 am
ALO
- SEA
1 stop21h 46m
American Airlines
Sun 8/211:56 pm
SEA
- ALO
1 stop12h 57m
American Airlines
Deal found 6/16![American Airlines logo]()
$578
One-way flights from Waterloo to SeattleSearch for one-way flight options from Waterloo to Seattle. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
Search for one-way flight options from Waterloo to Seattle. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Thu 7/25:05 am
ALO
- SEA
1 stop21h 47m
American Airlines
Deal found 6/13![American Airlines logo]()
$426
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 June 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $478 (American Airlines) |
One-way from | $426 (American Airlines) |
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 June 17, 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
Cheapest round-trip
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Wed 7/22
3:23 pm-8:37 pm
1 stop7h 14m
Seattle/Tacoma Intl
Tue 7/28
3:28 pm-12:29 am
1 stop7h 01m
$478
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Thu 8/20
3:23 pm-8:52 pm
1 stop7h 29m
Seattle/Tacoma Intl
Thu 8/27
5:50 am-2:52 pm
1 stop7h 02m
$542
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Mon 6/29
3:00 pm-12:41 am
1 stop11h 41m
Seattle/Tacoma Intl
Tue 7/7
6:00 am-12:29 am
1 stop16h 29m
$547
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Wed 7/22
3:23 pm-8:37 pm
1 stop7h 14m
Seattle/Tacoma Intl
Wed 7/29
3:28 pm-12:29 am
1 stop7h 01m
$568
Quickest round-trip
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Wed 7/22
3:23 pm-8:37 pm
1 stop7h 14m
Seattle/Tacoma Intl
Mon 7/27
6:00 am-2:53 pm
1 stop6h 53m
$619
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Thu 10/8
4:30 pm-12:14 am
1 stop9h 44m
Seattle/Tacoma Intl
Sun 10/11
2:12 pm-11:19 pm
1 stop7h 07m
$654
Cheapest one-way
Quickest one-way
WaterlooSeattle
ALO - SEA
ALOSEA
Waterloo
Thu 7/2
5:05 am-12:52 am
1 stop21h 47m
$426
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.
ALO-SEA
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.
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 June 17, 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.
Food
6.4
Boarding
7.5
Entertainment
6.8
Crew
7.9
Overall
7.1
Comfort
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Apr 2026
DFW - BDL
Food
6.4
Boarding
7.5
Entertainment
6.8
Crew
7.9
Overall
7.1
Comfort
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Apr 2026
DFW - BDL
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
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Issaquah
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Marysville
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Waterloo and Seattle flights
Browse other Waterloo and Seattle flight options. Last updated on June 17, 2026.
Other flights from Waterloo
Browse through other flights departing from Waterloo. Flights are based on user searches made on Cheapflights and were last updated on June 17, 2026.
Popular flight searches
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Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 17, 2026.
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 June 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$288 | Average$354 | FlexibilityNo cancel fee | On-time71% |