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$131+ Cheap flights from Harlingen, TX 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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SEA
may. 4 — may. 111
dom. 5/4
dom. 5/11
1 adult, Economy
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Cheap 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 abril 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$527
(United Airlines)

One-way from

$131
(Southwest)

Popular in

July

Cheapest in

March

Average price

$340
Provider with most accurate pricing for Harlingen Valley Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Harlingen Valley Intl-Seattle/Tacoma Intl flights.
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From Harlingen Valley Intl to Seattle/Tacoma Intl
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One-way flight from Harlingen Valley Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 16% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Harlingen to Seattle

Cheapest flights from Harlingen to Seattle
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 abril 29, 2025.

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.
mar. 5/137:15 amHRL - SEA
1 stop7h 45mUnited Airlines
sáb. 5/1711:59 pmSEA - HRL
1 stop9h 25mUnited Airlines
Deal found 4/27$527
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.
jue. 7/37:59 pmHRL - SEA
1 stop6h 45mAmerican Airlines
dom. 7/65:15 amSEA - HRL
1 stop8h 42mAmerican Airlines
Deal found 4/27$539
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.
jue. 7/32:15 pmHRL - SEA
2 stops9h 25mSouthwest
dom. 7/610:40 pmSEA - HRL
1 stop8h 35mSouthwest
Deal found 4/27$603

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 abril 29, 2025.
Use the filters below to find and compare flights from Harlingen to Seattle that are best for you.

Fly from

Harlingen

Fly to

Seattle

Route

Depart

Return

Price

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

mar. 5/13

7:15 am-1:00 pm

1 stop7h 45m

Seattle/Tacoma Intl

sáb. 5/17

11:59 pm-11:24 am

1 stop9h 25m

$527

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

jue. 7/3

7:59 pm-12:44 am

1 stop6h 45m

Seattle/Tacoma Intl

dom. 7/6

5:15 am-3:57 pm

1 stop8h 42m

$539

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

jue. 7/3

2:15 pm-9:40 pm

2 stops9h 25m

Seattle/Tacoma Intl

dom. 7/6

10:40 pm-9:15 am

1 stop8h 35m

$603

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

sáb. 6/7

2:40 pm-11:10 pm

1 stop10h 30m

$131

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

mar. 6/10

7:59 pm-12:44 am

1 stop6h 45m

$154

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

sáb. 6/7

2:07 pm-12:59 am

2 stops12h 52m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Harlingen, Texas-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen, Texas-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen, Texas-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harlingen, Texas-Seattle flights, Cheapflights users trust eDreams the most. eDreams 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, Texas-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.
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, Texas to Seattle?

Currently, January is the cheapest month in which you can book a flight from Harlingen, Texas to Seattle (average of $238). Flying from Harlingen, Texas to Seattle in July is currently the most expensive (average of $405). 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.

What is the cheapest time of day to fly from HRL to SEA?

Find hourly flight availability from Harlingen to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 29, 2025.

It’s typically best to fly out from Harlingen, Texas to Seattle in the morning. Doing so could potentially save you 29% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 abril 29, 2025.
Southwest
8.0
Very good
4,292 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,292 reviews
Southwest
8.0
Very good
4,292 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,696 reviews
Southwest
8.0
Very good
4,292 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,292 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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.

  • What are the cheapest airlines flying from Harlingen, Texas to Seattle round-trip?

    United Airlines, at $527, was found to be the cheapest airline from Harlingen, Texas to Seattle.Alternate airlines to your destination round-trip include American Airlines and Southwest.

  • What are the cheapest airlines to fly from Harlingen, Texas to Seattle one-way?

    $131 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $154 and $169, respectively.

  • Can I find deals for flights from Harlingen to Seattle that include hotel bookings?

    Yes. In addition to deals on Harlingen to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Harlingen to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harlingen to Seattle.

  • Can I find deals for business class flights from Harlingen to Seattle?

    Yes. Cheapflights offers flight deals from Harlingen to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Harlingen, Texas to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Harlingen, Texas to Seattle (average of $238). Flying from Harlingen, Texas to Seattle in July is currently the most expensive (average of $405). 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.

See more FAQs

Traveling to a place near Harlingen?

Book flights to Harlingen if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Kent
Aberdeen
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

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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 abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$187Average$297FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$251Average$442FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$346Average$480FlexibilityNo cancel feeOn-time69%

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