$179+ Cheap flights from Harlingen to Seattle (HRL - 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SEA
May 28 — Jun 41
Round-trip
1 adult, Economy
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Find cheap flights from Harlingen to Seattle 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 Harlingen to Seattle
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Cheapest flights from Harlingen to SeattleExplore the most affordable flight options available from Harlingen to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
Explore the most affordable flight options available from Harlingen to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
This American Airlines deal was found by Cheapflights users on 4/24. 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.
Wed 6/38:04 pm
HRL
- SEA
1 stop6h 55m
American Airlines
Tue 6/95:10 am
SEA
- HRL
1 stop9h 15m
American Airlines
Deal found 4/24![American Airlines logo]()
$344
This American Airlines deal was found by Cheapflights users on 4/23. 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 5/52:47 pm
HRL
- SEA
1 stop10h 00m
American Airlines
Fri 5/812:59 am
SEA
- HRL
1 stop7h 18m
American Airlines
Deal found 4/23![American Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:40 pm
HRL
- SEA
2 stops10h 00m
Southwest
Tue 6/308:50 am
SEA
- HRL
1 stop12h 10m
Southwest
Deal found 4/27![Southwest logo]()
$393
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:05 pm
HRL
- SEA
1 stop9h 39m
United Airlines
Sat 5/98:51 am
SEA
- HRL
2 stops11h 08m
United Airlines
Deal found 4/27![United Airlines logo]()
$400
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:00 pm
HRL
- SEA
2 stops9h 40m
Southwest
Fri 7/315:15 am
SEA
- HRL
2 stops9h 45m
Southwest
Deal found 4/26![Southwest logo]()
$402
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:55 pm
HRL
- SEA
2 stops8h 45m
Southwest
Fri 8/147:00 am
SEA
- HRL
2 stops11h 30m
Southwest
Deal found 4/23![Southwest logo]()
$424
Best flights from Harlingen to SeattleDiscover carefully curated flight deals from Harlingen to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
Discover carefully curated flight deals from Harlingen to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:00 pm
HRL
- SEA
2 stops9h 40m
Southwest
Fri 7/315:15 am
SEA
- HRL
2 stops9h 45m
Southwest
Deal found 4/26![Southwest logo]()
$402
This American Airlines deal was found by Cheapflights users on 4/27. 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 6/48:04 pm
HRL
- SEA
1 stop6h 55m
American Airlines
Tue 6/303:45 pm
SEA
- HRL
1 stop6h 29m
American Airlines
Deal found 4/27![American Airlines logo]()
$482
This United Airlines deal was found by Cheapflights users on 4/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1612:05 pm
HRL
- SEA
2 stops11h 01m
United Airlines
Mon 6/155:00 am
SEA
- HRL
1 stop8h 59m
United Airlines
Deal found 4/25![United Airlines logo]()
$591
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:55 pm
HRL
- SEA
2 stops8h 45m
Southwest
Fri 8/147:00 am
SEA
- HRL
2 stops11h 30m
Southwest
Deal found 4/23![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:40 pm
HRL
- SEA
2 stops9h 15m
Southwest
Sat 5/169:00 am
SEA
- HRL
2 stops10h 35m
Southwest
Deal found 4/26![Southwest logo]()
$444
This United Airlines deal was found by Cheapflights users on 4/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/912:05 pm
HRL
- SEA
3 stops13h 24m
United Airlines
Wed 5/135:05 am
SEA
- HRL
2 stops12h 55m
United Airlines
Deal found 4/24![United Airlines logo]()
$598
This American Airlines deal was found by Cheapflights users on 4/25. 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 5/168:03 pm
HRL
- SEA
1 stop15h 32m
American Airlines
Sun 6/1412:49 am
SEA
- HRL
1 stop7h 19m
American Airlines
Deal found 4/25![American Airlines logo]()
$619
This Southwest deal was found by Cheapflights users on 4/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:30 pm
HRL
- SEA
2 stops8h 35m
Southwest
Sun 5/2411:00 am
SEA
- HRL
2 stops9h 00m
Southwest
Deal found 4/28![Southwest logo]()
$532
This Southwest deal was found by Cheapflights users on 4/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:35 pm
HRL
- SEA
2 stops8h 25m
Southwest
Mon 6/155:15 am
SEA
- HRL
2 stops9h 45m
Southwest
Deal found 4/24![Southwest logo]()
$568
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/256:00 pm
HRL
- SEA
2 stops8h 55m
Southwest
Mon 6/16:15 am
SEA
- HRL
2 stops9h 10m
Southwest
Deal found 4/26![Southwest logo]()
$573
Last-minute flights from Harlingen to SeattleDiscover last-minute flight deals from Harlingen to Seattle. Data last updated April 28, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Seattle. Data last updated April 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:18 pm
HRL
- SEA
1 stop7h 34m
United Airlines
Wed 5/1311:59 pm
SEA
- HRL
1 stop9h 24m
United Airlines
Deal found 4/27![United Airlines logo]()
$450
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:00 pm
HRL
- SEA
2 stops9h 40m
Southwest
Wed 5/136:30 am
SEA
- HRL
2 stops8h 50m
Southwest
Deal found 4/27![Southwest logo]()
$460
This American Airlines deal was found by Cheapflights users on 4/23. 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 5/52:47 pm
HRL
- SEA
1 stop10h 00m
American Airlines
Fri 5/812:59 am
SEA
- HRL
1 stop7h 18m
American Airlines
Deal found 4/23![American Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 4/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:05 pm
HRL
- SEA
1 stop9h 39m
United Airlines
Sat 5/98:51 am
SEA
- HRL
2 stops11h 08m
United Airlines
Deal found 4/27![United Airlines logo]()
$400
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:40 pm
HRL
- SEA
2 stops9h 15m
Southwest
Sat 5/169:00 am
SEA
- HRL
2 stops10h 35m
Southwest
Deal found 4/26![Southwest logo]()
$444
This American Airlines deal was found by Cheapflights users on 4/26. 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 5/126:00 am
HRL
- SEA
1 stop6h 48m
American Airlines
Fri 5/1512:59 am
SEA
- HRL
1 stop7h 18m
American Airlines
Deal found 4/26![American Airlines logo]()
$459
This Southwest deal was found by Cheapflights users on 4/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:40 pm
HRL
- SEA
2 stops8h 55m
Southwest
Sat 5/236:40 am
SEA
- HRL
2 stops11h 15m
Southwest
Deal found 4/27![Southwest logo]()
$483
One-way flights from Harlingen to SeattleSearch for one-way flight options from Harlingen to Seattle. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
Search for one-way flight options from Harlingen to Seattle. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:00 pm
HRL
- SEA
2 stops9h 40m
Southwest
Deal found 4/23![Southwest logo]()
$179
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:00 pm
HRL
- SEA
2 stops9h 40m
Southwest
Deal found 4/26![Southwest logo]()
$189
This American Airlines deal was found by Cheapflights users on 4/26. 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 6/108:04 pm
HRL
- SEA
1 stop6h 55m
American Airlines
Deal found 4/26![American Airlines logo]()
$201
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/195:35 pm
HRL
- SEA
2 stops9h 15m
Southwest
Deal found 4/23![Southwest logo]()
$214
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:45 am
HRL
- SEA
2 stops9h 00m
Southwest
Deal found 4/26![Southwest logo]()
$245
This American Airlines deal was found by Cheapflights users on 4/23. 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 6/194:57 pm
HRL
- SEA
1 stop7h 35m
American Airlines
Deal found 4/23![American Airlines logo]()
$270
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:20 am
HRL
- SEA
1 stop15h 33m
United Airlines
Deal found 4/26![United Airlines logo]()
$372
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:20 am
HRL
- SEA
3 stops17h 50m
United Airlines
Deal found 4/23![United Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:20 am
HRL
- SEA
3 stops15h 50m
United Airlines
Deal found 4/26![United Airlines logo]()
$780
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/197:20 am
HRL
- SEA
3 stops17h 50m
United Airlines
Deal found 4/23![United Airlines logo]()
$838
Find flight deals from Harlingen to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) 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 April 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $344 (American Airlines) |
One-way from | $179 (Southwest) |
Popular in | January |
Cheapest in | February |
Average price | $518 |
Cheapflights Fare Finder
Customize your flight search to find flights from Harlingen 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 April 28, 2026.
Use the filters below to find and compare flights from Harlingen to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Wed 6/10
5:00 pm-12:40 am
2 stops9h 40m
Seattle/Tacoma Intl
Fri 7/31
5:15 am-5:00 pm
2 stops9h 45m
$402
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Mon 8/10
5:55 pm-12:40 am
2 stops8h 45m
Seattle/Tacoma Intl
Fri 8/14
7:00 am-8:30 pm
2 stops11h 30m
$424
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Tue 5/12
4:40 pm-11:55 pm
2 stops9h 15m
Seattle/Tacoma Intl
Sat 5/16
9:00 am-9:35 pm
2 stops10h 35m
$444
Quickest round-trip
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Thu 6/4
8:04 pm-12:59 am
1 stop6h 55m
Seattle/Tacoma Intl
Tue 6/30
3:45 pm-12:14 am
1 stop6h 29m
$482
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Thu 5/21
12:30 pm-7:05 pm
2 stops8h 35m
Seattle/Tacoma Intl
Sun 5/24
11:00 am-10:00 pm
2 stops9h 00m
$532
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 5/16
3:35 pm-10:00 pm
2 stops8h 25m
Seattle/Tacoma Intl
Mon 6/15
5:15 am-5:00 pm
2 stops9h 45m
$568
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Mon 5/25
6:00 pm-12:55 am
2 stops8h 55m
Seattle/Tacoma Intl
Mon 6/1
6:15 am-5:25 pm
2 stops9h 10m
$573
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 5/16
12:05 pm-9:06 pm
2 stops11h 01m
Seattle/Tacoma Intl
Mon 6/15
5:00 am-3:59 pm
1 stop8h 59m
$591
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 5/9
12:05 pm-11:29 pm
3 stops13h 24m
Seattle/Tacoma Intl
Wed 5/13
5:05 am-8:00 pm
2 stops12h 55m
$598
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 5/16
8:03 pm-9:35 am
1 stop15h 32m
Seattle/Tacoma Intl
Sun 6/14
12:49 am-10:08 am
1 stop7h 19m
$619
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Harlingen to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harlingen to Seattle in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Harlingen-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Harlingen-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 Harlingen-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 Harlingen to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Harlingen with our price prediction graph.
HRL-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.
Cheapflights Insights
Everything you need to know about your flight from Harlingen to Seattle
What is the cheapest month to book a flight from Harlingen to Seattle?
Currently, February is the cheapest month in which you can book a flight from Harlingen to Seattle (average of $250). Flying from Harlingen to Seattle in January is currently the most expensive (average of $604). 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.
How much does it cost to fly round-trip from Harlingen to Seattle?
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 April 28, 2026.
Read through reviews of airlines operating flights from Harlingen to Seattle, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Harlingen 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
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
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Lakewood
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Shoreline
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Harlingen and Seattle flights
Browse other Harlingen and Seattle flight options. Last updated on April 28, 2026.
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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 April 28, 2026.
Top 3 airlines flying from Harlingen to Seattle
Discover the top 3 airlines that operate flights from Harlingen 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 April 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$215 | Average$426 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$222 | Average$603 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$250 | Average$448 | FlexibilityNo cancel fee | On-time69% |