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$214+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SEA
Feb 26 — Mrz 51
Mi 2/26
Mi 3/5
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 Februar 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$317
(American Airlines)

One-way from

$214
(Delta)

Popular in

July

Cheapest in

November

Average price

$364
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. 19% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in February 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 Februar 21, 2025.

This American Airlines deal was found by Cheapflights users on 2/19. 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.
Mi 3/54:30 pmHRL - SEA
1 stop6h 50mAmerican Airlines
Mo 3/102:07 pmSEA - HRL
1 stop7h 56mAmerican Airlines
Deal found 2/19$317
This Delta deal was found by Cheapflights users on 2/20. 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.
Do 3/62:28 pmHRL - SEA
1 stop7h 02mDelta
So 3/97:15 amSEA - HRL
1 stop7h 27mDelta
Deal found 2/20$339
This Southwest deal was found by Cheapflights users on 2/19. 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.
Do 2/275:30 pmHRL - SEA
2 stops8h 55mSouthwest
Di 3/47:30 amSEA - HRL
2 stops10h 35mSouthwest
Deal found 2/19$439
This United deal was found by Cheapflights users on 2/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 3/55:15 amHRL - SEA
2 stops12h 39mUnited Airlines
Mo 3/109:18 amSEA - HRL
2 stops11h 56mUnited Airlines
Deal found 2/19$440

Find flights from Harlingen to Seattle within your budget

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 Februar 21, 2025.

Fly from

Harlingen

Fly to

Seattle

Route

Depart

Return

Price

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mi 3/5

4:30 pm-9:20 pm

1 stop6h 50m

Seattle/Tacoma Intl

So 3/9

12:59 am-9:45 am

1 stop6h 46m

$317

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Do 3/6

2:28 pm-7:30 pm

1 stop7h 02m

Seattle/Tacoma Intl

So 3/9

7:15 am-4:42 pm

1 stop7h 27m

$339

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mi 3/5

5:15 am-3:54 pm

2 stops12h 39m

Seattle/Tacoma Intl

Mo 3/10

9:18 am-11:14 pm

2 stops11h 56m

$440

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mi 5/21

11:45 am-7:35 pm

2 stops9h 50m

Seattle/Tacoma Intl

Sa 5/24

6:15 am-7:35 pm

2 stops11h 20m

$493

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mo 4/21

2:41 pm-11:24 pm

1 stop10h 43m

$214

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mo 4/21

5:34 pm-11:49 am

3 stops20h 15m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 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 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, 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.

Travel insights for flights from Harlingen to Seattle

Get recent, data-driven insights about flights from Harlingen to Seattle including ideal travel times, pricing trends, and more.

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 $411). 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 Februar 21, 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 Februar 21, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Harlingen to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,401 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,401 reviews
Southwest
8.1
Very good
4,401 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,213 reviews
Southwest
8.1
Very good
4,401 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,759 reviews
Southwest
8.1
Very good
4,401 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,401 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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?

    American Airlines, at $317, was found to be the cheapest airline from Harlingen, Texas to Seattle.Alternate airlines to your destination round-trip include Delta and United Airlines. American Airlines is currently priced 32% below the average price you’ll pay for this route.

  • 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 $411). 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
Renton
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

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Top 2 airlines flying from Harlingen to Seattle

Discover the top 2 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 Februar 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$263Average$485FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$323Average$465FlexibilityNo cancel feeOn-time69%
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