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Harlingen

$154+ Cheap flights from Seattle to Harlingen, TX (SEA - HRL)

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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HRL
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Seattle to Harlingen

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Harlingen (HRL). 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 May 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$361
(United Airlines)

One-way from

$154
(American Airlines)

Popular in

June

Cheapest in

May

Average price

$281
Provider with most accurate pricing for Seattle/Tacoma Intl-Harlingen Valley Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Harlingen Valley Intl flights.
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From Seattle/Tacoma Intl to Harlingen Valley Intl
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One-way flight from Seattle/Tacoma Intl to Harlingen Valley Intl
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Highest demand for flights based on searches. 15% potential increase in price ($84 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Seattle to Harlingen

Cheapest flights from Seattle to Harlingen
Explore the most affordable flight options available from Seattle to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/30. 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 5/236:25 amSEA - HRL
2 stops11h 00mUnited Airlines
Tue 5/272:07 pmHRL - SEA
1 stop7h 07mUnited Airlines
Deal found 4/30$361
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/221:10 amSEA - HRL
1 stop12h 47mAmerican Airlines
Tue 5/277:56 pmHRL - SEA
1 stop6h 49mAmerican Airlines
Deal found 4/30$668

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Harlingen 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 May 1, 2025.
Use the filters below to find and compare flights from Seattle to Harlingen that are best for you.

Fly from

Seattle

Fly to

Harlingen

Route

Depart

Return

Price

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 5/23

6:25 am-7:25 pm

2 stops11h 00m

Harlingen Valley Intl

Tue 5/27

2:07 pm-7:14 pm

1 stop7h 07m

$361

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 5/22

1:10 am-3:57 pm

1 stop12h 47m

Harlingen Valley Intl

Tue 5/27

7:56 pm-12:45 am

1 stop6h 49m

$668

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 6/16

1:22 am-9:35 am

1 stop6h 13m

$154

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 6/17

5:00 am-5:30 pm

2 stops10h 30m

$169

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 6/17

6:25 am-7:25 pm

2 stops11h 00m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Compare providers for flights from Seattle to Harlingen

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 Seattle to Harlingen in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 Seattle-Harlingen, Texas flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Harlingen, Texas flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Harlingen, Texas flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Harlingen, Texas 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 Seattle-Harlingen, Texas 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 Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from Seattle 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 Seattle to Harlingen

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

Currently, April is the cheapest month in which you can book a flight from Seattle to Harlingen, Texas (average of $267). Flying from Seattle to Harlingen, Texas 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 SEA to HRL?

Find hourly flight availability from Seattle to Harlingen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

It’s typically best to fly out from Seattle to Harlingen, Texas at noon. Doing so could potentially save you 43% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Harlingen by month

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

In terms of precipitation, rainfall in Harlingen, Texas ranges from 1.1 - 5.2 inches per month. September is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Harlingen, Texas when rainfall is around 1.1 in.

Temperature in Harlingen by month

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

If weather is an important factor for your trip to Harlingen, Texas, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).

Reviews of airlines servicing Harlingen

Get insights into the airlines that provide service to Harlingen. 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 Harlingen. Reviews last updated May 1, 2025.
Southwest
8.0
Very good
4,294 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Food

7.1

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
4,294 reviews
Southwest
8.0
Very good
4,294 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Food

7.1

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
4,294 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Food

7.1

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
4,294 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Food

7.1

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 Seattle to Harlingen. 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 Seattle to Harlingen, Texas round-trip?

    Currently priced at $361, United Airlines will fly you from Seattle to Harlingen, Texas and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $668. United Airlines is 21% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $154. However, be on the lookout for offers from Southwest and United Airlines, as they are both options that can get you from Seattle to Harlingen, Texas for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Harlingen 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 Seattle to Harlingen, Texas?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Harlingen, Texas (average of $267). Flying from Seattle to Harlingen, Texas 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.

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Top 3 airlines flying from Seattle to Harlingen

Discover the top 3 airlines that operate flights from Seattle to Harlingen. 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$225Average$366FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$432FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$327Average$413FlexibilityNo cancel feeOn-time63%

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