$107+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SEA
Jul 10 — Jul 171
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
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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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Best
Last-minute
One-way
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 June 10, 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 June 10, 2026.
This Southwest deal was found by Cheapflights users on 6/7. 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 9/93:25 pm
HRL
- SEA
2 stops9h 40m
Southwest
Sat 9/125:30 am
SEA
- HRL
2 stops11h 20m
Southwest
Deal found 6/7![Southwest logo]()
$234
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sun 8/232:15 pm
HRL
- SEA
2 stops9h 30m
Southwest
Mon 8/315:30 am
SEA
- HRL
2 stops8h 35m
Southwest
Deal found 6/9![Southwest logo]()
$322
This American Airlines deal was found by Cheapflights users on 6/9. 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 9/53:17 pm
HRL
- SEA
1 stop9h 02m
American Airlines
Sat 9/195:30 am
SEA
- HRL
1 stop7h 35m
American Airlines
Deal found 6/9![American Airlines logo]()
$375
This Southwest deal was found by Cheapflights users on 6/8. 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 7/115:10 pm
HRL
- SEA
1 stop9h 00m
Southwest
Sat 7/256:45 am
SEA
- HRL
1 stop7h 45m
Southwest
Deal found 6/8![Southwest logo]()
$403
This Southwest deal was found by Cheapflights users on 6/10. 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 7/47:15 am
HRL
- SEA
2 stops10h 40m
Southwest
Fri 7/1011:05 am
SEA
- HRL
1 stop10h 40m
Southwest
Deal found 6/10![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 6/10. 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 7/175:35 pm
HRL
- SEA
2 stops10h 10m
Southwest
Fri 7/245:15 am
SEA
- HRL
2 stops9h 45m
Southwest
Deal found 6/10![Southwest logo]()
$423
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 June 10, 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 June 10, 2026.
This Southwest deal was found by Cheapflights users on 6/9. 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.
Sun 8/232:15 pm
HRL
- SEA
2 stops9h 30m
Southwest
Mon 8/315:30 am
SEA
- HRL
2 stops8h 35m
Southwest
Deal found 6/9![Southwest logo]()
$322
This United Airlines deal was found by Cheapflights users on 6/9. 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 10/212:00 pm
HRL
- SEA
1 stop7h 03m
United Airlines
Sat 10/2411:59 pm
SEA
- HRL
1 stop9h 00m
United Airlines
Deal found 6/9![United Airlines logo]()
$455
This Southwest deal was found by Cheapflights users on 6/10. 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 7/47:15 am
HRL
- SEA
2 stops10h 40m
Southwest
Fri 7/1011:05 am
SEA
- HRL
1 stop10h 40m
Southwest
Deal found 6/10![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 6/8. 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 7/114:10 pm
HRL
- SEA
1 stop6h 45m
Southwest
Sat 7/255:30 am
SEA
- HRL
2 stops9h 00m
Southwest
Deal found 6/8![Southwest logo]()
$421
This Southwest deal was found by Cheapflights users on 6/10. 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 7/175:35 pm
HRL
- SEA
2 stops10h 10m
Southwest
Fri 7/2411:05 am
SEA
- HRL
1 stop10h 40m
Southwest
Deal found 6/10![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 6/6. 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 7/85:00 pm
HRL
- SEA
2 stops9h 45m
Southwest
Mon 7/1312:20 pm
SEA
- HRL
2 stops9h 25m
Southwest
Deal found 6/6![Southwest logo]()
$474
Last-minute flights from Harlingen to SeattleDiscover last-minute flight deals from Harlingen to Seattle. Data last updated June 10, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Seattle. Data last updated June 10, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/10. 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 7/47:15 am
HRL
- SEA
2 stops10h 40m
Southwest
Fri 7/1011:05 am
SEA
- HRL
1 stop10h 40m
Southwest
Deal found 6/10![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 6/6. 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 7/85:00 pm
HRL
- SEA
2 stops9h 45m
Southwest
Mon 7/1312:20 pm
SEA
- HRL
2 stops9h 25m
Southwest
Deal found 6/6![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 6/8. 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 7/115:10 pm
HRL
- SEA
1 stop9h 00m
Southwest
Sat 7/256:45 am
SEA
- HRL
1 stop7h 45m
Southwest
Deal found 6/8![Southwest logo]()
$403
This Southwest deal was found by Cheapflights users on 6/10. 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 7/175:35 pm
HRL
- SEA
2 stops10h 10m
Southwest
Fri 7/245:15 am
SEA
- HRL
2 stops9h 45m
Southwest
Deal found 6/10![Southwest logo]()
$423
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/178:04 pm
HRL
- SEA
1 stop6h 53m
American Airlines
Fri 7/245:05 am
SEA
- HRL
1 stop9h 18m
American Airlines
Deal found 6/10![American Airlines logo]()
$455
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 June 10, 2026.
Search for one-way flight options from Harlingen to Seattle. Find affordable one-way fares based on user searches. Data last updated June 10, 2026.
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/62:00 pm
HRL
- SEA
2 stops12h 11m
Delta
Deal found 6/10![Delta logo]()
$107
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/151:59 pm
HRL
- SEA
1 stop9h 37m
United Airlines
Deal found 6/9![United Airlines logo]()
$122
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/121:59 pm
HRL
- SEA
1 stop9h 37m
United Airlines
Deal found 6/9![United Airlines logo]()
$172
This Southwest deal was found by Cheapflights users on 6/9. 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 8/1511:30 am
HRL
- SEA
2 stops8h 45m
Southwest
Deal found 6/9![Southwest logo]()
$180
This Southwest deal was found by Cheapflights users on 6/8. 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 7/205:35 pm
HRL
- SEA
2 stops10h 10m
Southwest
Deal found 6/8![Southwest logo]()
$195
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Thu 6/255:20 pm
HRL
- SEA
1 stop7h 22m
United Airlines
Deal found 6/5![United Airlines logo]()
$245
This Southwest deal was found by Cheapflights users on 6/5. 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 6/255:35 pm
HRL
- SEA
2 stops9h 15m
Southwest
Deal found 6/5![Southwest logo]()
$268
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/208:04 pm
HRL
- SEA
1 stop6h 53m
American Airlines
Deal found 6/8![American Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 6/10. 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 10/65:05 am
HRL
- SEA
3 stops18h 10m
United Airlines
Deal found 6/10![United Airlines logo]()
$294
This Southwest deal was found by Cheapflights users on 6/7. 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 6/185:35 pm
HRL
- SEA
2 stops10h 05m
Southwest
Deal found 6/7![Southwest logo]()
$298
This American Airlines deal was found by Cheapflights users on 6/9. 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 8/135:04 pm
HRL
- SEA
1 stop9h 46m
American Airlines
Deal found 6/9![American Airlines logo]()
$306
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 June 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $234 (Southwest) |
One-way from | $122 (United Airlines) |
Popular in | January |
Cheapest in | February |
Average price | $449 |
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 June 10, 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
Sun 8/23
2:15 pm-9:45 pm
2 stops9h 30m
Seattle/Tacoma Intl
Mon 8/31
5:30 am-4:05 pm
2 stops8h 35m
$322
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 7/4
7:15 am-3:55 pm
2 stops10h 40m
Seattle/Tacoma Intl
Fri 7/10
11:05 am-11:45 pm
1 stop10h 40m
$408
Quickest round-trip
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 7/11
4:10 pm-8:55 pm
1 stop6h 45m
Seattle/Tacoma Intl
Sat 7/25
5:30 am-4:30 pm
2 stops9h 00m
$421
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Fri 7/17
5:35 pm-1:45 am
2 stops10h 10m
Seattle/Tacoma Intl
Fri 7/24
11:05 am-11:45 pm
1 stop10h 40m
$424
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Wed 10/21
2:00 pm-7:03 pm
1 stop7h 03m
Seattle/Tacoma Intl
Sat 10/24
11:59 pm-10:59 am
1 stop9h 00m
$455
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Wed 7/8
5:00 pm-12:45 am
2 stops9h 45m
Seattle/Tacoma Intl
Mon 7/13
12:20 pm-11:45 pm
2 stops9h 25m
$474
Cheapest one-way
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Tue 10/6
2:00 pm-12:11 am
2 stops12h 11m
$107
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Tue 8/18
1:59 pm-9:36 pm
1 stop9h 37m
$172
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Sat 8/15
11:30 am-6:15 pm
2 stops8h 45m
$180
HarlingenSeattle
HRL - SEA
HRLSEA
Harlingen Valley Intl
Mon 7/20
5:35 pm-1:45 am
2 stops10h 10m
$195
Showing 1-10 of 16 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 June.
| 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 June 10, 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
Food
7.0
Comfort
8.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
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Renton
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Harlingen and Seattle flights
Browse other Harlingen and Seattle flight options. Last updated on June 10, 2026.
Other flights from Harlingen
Browse through other flights departing from Harlingen. Flights are based on user searches made on Cheapflights and were last updated on June 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 10, 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 June 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$215 | Average$426 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$468 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$297 | Average$603 | FlexibilityNo cancel fee | On-time63% |