$361+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ALO
Nov 25 — Dec 21
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Waterloo 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 Seattle to Waterloo
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Best
Last-minute
One-way
Cheapest flights from Seattle to WaterlooExplore 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 October 26, 2026.
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 October 26, 2026.
This American Airlines deal was found by Cheapflights users on 10/25. 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 12/222:01 pm -
1 stop7h 58m
Tue 1/57:04 am -
1 stop8h 07m
Deal found 10/25![American Airlines logo]()
$466
This American Airlines deal was found by Cheapflights users on 10/22. 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 12/35:39 pm -
1 stop19h 35m
Sun 12/63:44 pm -
1 stop19h 59m
Deal found 10/22![American Airlines logo]()
$505
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/66:14 am -
1 stop15h 24m
Sun 11/83:43 pm -
1 stop19h 56m
Deal found 10/21![American Airlines logo]()
$622
This American Airlines deal was found by Cheapflights users on 10/25. 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 10/283:14 pm -
1 stop6h 37m
Mon 11/26:04 am -
2 stops11h 56m
Deal found 10/25![American Airlines logo]()
$719
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Sun 12/202:01 pm -
1 stop7h 58m
Sun 12/274:19 pm -
1 stop9h 23m
Deal found 10/21![American Airlines logo]()
$828
Best flights from Seattle to WaterlooDiscover carefully curated flight deals from Seattle to Waterloo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
Discover carefully curated flight deals from Seattle to Waterloo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
This American Airlines deal was found by Cheapflights users on 10/25. 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 12/222:01 pm -
1 stop7h 58m
Tue 1/57:04 am -
1 stop8h 07m
Deal found 10/25![American Airlines logo]()
$466
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/66:14 am -
1 stop15h 24m
Sun 11/83:43 pm -
1 stop19h 56m
Deal found 10/21![American Airlines logo]()
$622
This American Airlines deal was found by Cheapflights users on 10/22. 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 12/36:20 am -
1 stop6h 54m
Sun 12/65:34 am -
2 stops12h 38m
Deal found 10/22![American Airlines logo]()
$707
This American Airlines deal was found by Cheapflights users on 10/25. 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 3/133:11 pm -
1 stop7h 18m
Fri 3/265:25 am -
2 stops12h 16m
Deal found 10/25![American Airlines logo]()
$820
This American Airlines deal was found by Cheapflights users on 10/25. 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.
Sun 3/143:11 pm -
1 stop7h 18m
Wed 3/245:25 am -
1 stop21h 09m
Deal found 10/25![American Airlines logo]()
$823
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Sun 12/202:01 pm -
1 stop7h 58m
Sun 12/274:19 pm -
1 stop9h 23m
Deal found 10/21![American Airlines logo]()
$828
This American Airlines deal was found by Cheapflights users on 10/25. 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 3/1311:17 am -
2 stops11h 12m
Tue 3/235:25 am -
2 stops17h 56m
Deal found 10/25![American Airlines logo]()
$830
This American Airlines deal was found by Cheapflights users on 10/25. 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 3/1611:17 am -
2 stops26h 05m
Sat 3/205:25 am -
2 stops13h 43m
Deal found 10/25![American Airlines logo]()
$859
This American Airlines deal was found by Cheapflights users on 10/25. 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.
Sun 12/202:01 pm -
1 stop7h 58m
Sat 12/265:34 am -
1 stop10h 07m
Deal found 10/25![American Airlines logo]()
$866
Last-minute flights from Seattle to WaterlooDiscover last-minute flight deals from Seattle to Waterloo. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Waterloo. Data last updated October 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/25. 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 10/283:14 pm -
1 stop6h 37m
Mon 11/26:04 am -
2 stops11h 56m
Deal found 10/25![American Airlines logo]()
$719
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/66:14 am -
1 stop15h 24m
Sun 11/83:43 pm -
1 stop19h 56m
Deal found 10/21![American Airlines logo]()
$622
This American Airlines deal was found by Cheapflights users on 10/24. 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.
Sun 11/811:34 pm -
1 stop22h 04m
Thu 11/126:04 am -
1 stop12h 06m
Deal found 10/24![American Airlines logo]()
$1,048
One-way flights from Seattle to WaterlooSearch for one-way flight options from Seattle to Waterloo. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
Search for one-way flight options from Seattle to Waterloo. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This American Airlines deal was found by Cheapflights users on 10/22. 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 11/1210:43 am -
1 stop10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![American Airlines logo]()
$361
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 October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $466 (American Airlines) |
One-way from | $361 (American Airlines) |
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 7,457,451 searches. Data last updated October 26, 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
Cheapest round-trip
Quickest round-trip
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Thu 11/12
10:43 am-11:38 pm
1 stop10h 55m
Waterloo
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$361
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Tue 12/22
2:01 pm-11:59 pm
1 stop7h 58m
Waterloo
Tue 1/5
7:04 am-1:11 pm
1 stop8h 07m
$466
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Fri 11/6
6:14 am-11:38 pm
1 stop15h 24m
Waterloo
Sun 11/8
3:43 pm-9:39 am
1 stop19h 56m
$622
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Thu 12/3
6:20 am-3:14 pm
1 stop6h 54m
Waterloo
Sun 12/6
5:34 am-4:12 pm
2 stops12h 38m
$707
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Sat 3/13
3:11 pm-12:29 am
1 stop7h 18m
Waterloo
Fri 3/26
5:25 am-3:41 pm
2 stops12h 16m
$820
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Sun 3/14
3:11 pm-12:29 am
1 stop7h 18m
Waterloo
Wed 3/24
5:25 am-12:34 am
1 stop21h 09m
$823
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Sun 12/20
2:01 pm-11:59 pm
1 stop7h 58m
Waterloo
Sun 12/27
4:19 pm-11:42 pm
1 stop9h 23m
$828
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Sat 3/13
11:17 am-12:29 am
2 stops11h 12m
Waterloo
Tue 3/23
5:25 am-9:21 pm
2 stops17h 56m
$830
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Tue 3/16
11:17 am-3:22 pm
2 stops26h 05m
Waterloo
Sat 3/20
5:25 am-5:08 pm
2 stops13h 43m
$859
SeattleWaterloo
SEA Seattle/Tacoma Intl - ALO Waterloo
SEAALO
Seattle/Tacoma Intl
Sun 12/20
2:01 pm-11:59 pm
1 stop7h 58m
Waterloo
Sat 12/26
5:34 am-1:41 pm
1 stop10h 07m
$866
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.
SEA-ALO
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.
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.
Traveling to a place near Waterloo?
Book flights to Waterloo if you plan to visit one of these locationsCedar Falls
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