HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HRL
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Harlingen 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 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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Delta)

One-way from

$154
(American Airlines)

Popular in

June

Cheapest in

November

Average price

$351
Provider with most accurate pricing for Seattle/Tacoma Intl-Harlingen Valley Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Harlingen Valley Intl flights.
Search Deals
From Seattle/Tacoma Intl to Harlingen Valley Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Harlingen Valley Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 22, 2025.

This Delta deal was found by Cheapflights users on 2/21. 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.
Fri 5/27:15 amSEA - HRL
1 stop7h 33mDelta
Mon 5/52:41 pmHRL - SEA
1 stop11h 05mDelta
Deal found 2/21$257
This American Airlines deal was found by Cheapflights users on 2/21. 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 3/712:15 amSEA - HRL
1 stop7h 27mAmerican Airlines
Wed 3/127:54 pmHRL - SEA
1 stop6h 54mAmerican Airlines
Deal found 2/21$327
This Southwest deal was found by Cheapflights users on 2/21. 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 5/25:35 amSEA - HRL
2 stops9h 10mSouthwest
Mon 5/55:35 pmHRL - SEA
2 stops8h 55mSouthwest
Deal found 2/21$372
This United Airlines deal was found by Cheapflights users on 2/21. 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 3/811:59 pmSEA - HRL
1 stop8h 23mUnited Airlines
Wed 3/127:15 amHRL - SEA
2 stops10h 39mUnited Airlines
Deal found 2/21$423

Find flights from Seattle to Harlingen within your budget

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 February 22, 2025.

Fly from

Seattle

Fly to

Harlingen

Route

Depart

Return

Price

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 5/2

7:15 am-4:48 pm

1 stop7h 33m

Harlingen Valley Intl

Mon 5/5

2:41 pm-11:46 pm

1 stop11h 05m

$257

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 3/7

12:15 am-9:42 am

1 stop7h 27m

Harlingen Valley Intl

Wed 3/12

7:54 pm-12:48 am

1 stop6h 54m

$327

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 5/2

5:35 am-4:45 pm

2 stops9h 10m

Harlingen Valley Intl

Mon 5/5

5:35 pm-12:30 am

2 stops8h 55m

$372

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 3/8

11:59 pm-10:22 am

1 stop8h 23m

Harlingen Valley Intl

Wed 3/12

7:15 am-3:54 pm

2 stops10h 39m

$423

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 3/26

12:59 am-11:37 am

1 stop8h 38m

$154

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 3/27

6:40 am-8:15 pm

2 stops11h 35m

$209

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 3/27

7:10 pm-1:29 pm

3 stops16h 19m

$1,208

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

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 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 Seattle-Harlingen, Texas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Harlingen, Texas flight deals on Cheapflights vs. FlightHub >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 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 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.

Travel insights for flights from Seattle to Harlingen

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

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 $420). 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 February 22, 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 February 22, 2025.
To help decide which airline to fly from Seattle to Harlingen, see what other customers have to say about Southwest, Delta and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

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
4,396 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

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
8,203 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

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
8,754 reviews
Southwest
8.1
Very good
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

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
4,396 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Food

7.1

Comfort

8.1

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 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 $257, Delta will fly you from Seattle to Harlingen, Texas and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Southwest - these airlines can fly you to your destination from $327 and $372, respectively. Delta is 49% 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 $420). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Dallas/Fort Worth flights
Seattle to Hobby flights
Seattle to George Bush Intcntl flights
Seattle to Austin flights
Seattle to San Antonio flights
Portland to Dallas/Fort Worth flights
Seattle to Love Field flights
Portland to Austin flights
Portland to Hobby flights
Portland to George Bush Intcntl flights
Seattle to El Paso flights
Spokane to Dallas/Fort Worth flights
Portland to Love Field flights
Portland to San Antonio flights
Spokane to Love Field flights
Spokane to Hobby flights
Spokane to George Bush Intcntl flights
Spokane to Austin flights
Pasco to Dallas/Fort Worth flights
Seattle to Corpus Christi flights
Spokane to San Antonio flights
Pasco to Hobby flights
Seattle to Laredo flights
Seattle to Amarillo flights
Seattle to Midland flights
Pasco to Austin flights
Seattle to Lubbock flights
Seattle to McAllen flights
Pasco to George Bush Intcntl flights
Portland to Corpus Christi flights
Seattle to Brownsville flights
Portland to El Paso flights
Bellingham to Dallas/Fort Worth flights
Pasco to San Antonio flights
Pasco to Love Field flights
Spokane to El Paso flights
Portland to Amarillo flights
Bellingham to Hobby flights
Portland to McAllen flights
Seattle to Waco flights
Seattle to Killeen flights
Portland to Lubbock flights
Seattle to Longview flights
Portland to Harlingen flights
Portland to Midland flights
Bellingham to George Bush Intcntl flights
Portland to Laredo flights
Pullman to Dallas/Fort Worth flights
Spokane to Midland flights

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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$256Average$402FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$294Average$566FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$327Average$413FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.