How long is the flight from Harlingen, Texas to Seattle?

Airlines like United Airlines and American Airlines fly from Harlingen, Texas to Seattle in about 7h. The time it takes to get you to your destination can typically vary by up to 3h 51m. There are 1984 mi between Harlingen, Texas and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Delta, at $187, was found to be the cheapest airline from Harlingen, Texas to Seattle.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is currently priced 55% below the average price you’ll pay for this route.

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.

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).

What are the most popular airlines that fly from Harlingen, Texas to Seattle?

The most popular airlines flying from Harlingen, Texas to Seattle are American Airlines, Southwest and United Airlines. Something to consider prior to booking your flight.

Most accurate provider : When it comes to deals on Harlingen, Texas-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Harlingen, Texas-Seattle flight deals on Cheapflights vs. eDreams >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.

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.

$257+ Flights from Harlingen, TX to Seattle

Q: How much does it cost to fly round-trip from Harlingen, Texas to Seattle?

Airfare is below average for this route at the moment. Harlingen, Texas to Seattle flights typically cost between $457 and $541 in January. The cheapest round-trip price found within the last 3 days was $257 on United Airlines (Jan 9-Jan 16).

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Cheap 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 December 12, 2025.

Mon 12/155:36 amHRL - SEA

1 stop7h 07mAmerican Airlines

Wed 12/172:19 pmSEA - HRL

1 stop6h 52mAmerican Airlines

Deal found 12/11

$550

Mon 12/1511:30 amHRL - SEA

2 stops13h 00mSouthwest

Wed 12/175:15 amSEA - HRL

2 stops9h 50mSouthwest

Deal found 12/11

$610

Sun 12/218:11 pmHRL - SEA

1 stop6h 46mAmerican Airlines

Fri 1/1611:12 pmSEA - HRL

1 stop9h 24mAmerican Airlines

Deal found 12/11

$611

Sun 12/217:00 amHRL - SEA

2 stops13h 06mUnited Airlines

Fri 1/1612:57 pmSEA - HRL

1 stop7h 02mUnited Airlines

Deal found 12/11

$726

Sun 12/218:11 pmHRL - SEA

1 stop6h 46mAmerican Airlines

Mon 12/2212:59 amSEA - HRL

1 stop6h 41mAmerican Airlines

Deal found 12/11

$900

Mon 12/159:20 amHRL - SEA

3 stops15h 55mUnited Airlines

Wed 12/175:05 pmSEA - HRL

2 stops16h 08mUnited Airlines

Deal found 12/11

$1,012

Sun 12/215:00 amHRL - SEA

3 stops18h 07mUnited Airlines

Tue 12/233:50 pmSEA - HRL

2 stops17h 23mUnited Airlines

Deal found 12/11

$1,464

Best flights from Harlingen to Seattle
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 December 12, 2025.

Fri 1/95:25 pmHRL - SEA

1 stop7h 34mUnited Airlines

Fri 1/1612:57 pmSEA - HRL

1 stop7h 02mUnited Airlines

Deal found 12/11

$257

Sat 2/79:20 amHRL - SEA

2 stops13h 52mUnited Airlines

Mon 2/912:57 pmSEA - HRL

1 stop7h 02mUnited Airlines

Deal found 12/10

$342

Tue 5/125:18 pmHRL - SEA

1 stop7h 31mUnited Airlines

Thu 5/215:00 amSEA - HRL

1 stop8h 34mUnited Airlines

Deal found 12/10

$413

Last-minute flights from Harlingen to Seattle
Discover last-minute flight deals from Harlingen to Seattle. Data last updated December 12, 2025 and is based on user searches.

Mon 12/155:36 amHRL - SEA

1 stop7h 07mAmerican Airlines

Wed 12/172:19 pmSEA - HRL

1 stop6h 52mAmerican Airlines

Deal found 12/11

$550

Mon 12/1511:30 amHRL - SEA

2 stops13h 00mSouthwest

Wed 12/175:15 amSEA - HRL

2 stops9h 50mSouthwest

Deal found 12/11

$610

Mon 12/159:20 amHRL - SEA

3 stops15h 55mUnited Airlines

Wed 12/175:05 pmSEA - HRL

2 stops16h 08mUnited Airlines

Deal found 12/11

$1,012

Sun 12/218:11 pmHRL - SEA

1 stop6h 46mAmerican Airlines

Fri 1/1611:12 pmSEA - HRL

1 stop9h 24mAmerican Airlines

Deal found 12/11

$611

Sun 12/217:00 amHRL - SEA

2 stops13h 06mUnited Airlines

Fri 1/1612:57 pmSEA - HRL

1 stop7h 02mUnited Airlines

Deal found 12/11

$726

Sun 12/218:11 pmHRL - SEA

1 stop6h 46mAmerican Airlines

Mon 12/2212:59 amSEA - HRL

1 stop6h 41mAmerican Airlines

Deal found 12/11

$900

Fri 1/95:25 pmHRL - SEA

1 stop7h 34mUnited Airlines

Fri 1/1612:57 pmSEA - HRL

1 stop7h 02mUnited Airlines

Deal found 12/11

$257

One-way flights from Harlingen to Seattle
Search for one-way flight options from Harlingen to Seattle. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Thu 12/1811:49 amHRL - SEA

1 stop12h 59mSun Country Air

Deal found 12/10

$268

Sat 12/208:11 pmHRL - SEA

1 stop6h 46mAmerican Airlines

Deal found 12/10

$270

Thu 12/1810:12 amHRL - SEA

2 stops14h 32mAmerican Airlines

Deal found 12/11

$275

Tue 12/233:15 pmHRL - SEA

1 stop10h 16mDelta

Deal found 12/10

$280

Sun 12/215:20 pmHRL - SEA

1 stop9h 14mUnited Airlines

Deal found 12/10

$300

Sat 12/2010:19 amHRL - SEA

1 stop9h 41mSun Country Air

Deal found 12/10

$303

Fri 12/195:00 amHRL - SEA

2 stops15h 06mUnited Airlines

Deal found 12/11

$305

Thu 12/185:00 amHRL - SEA

3 stops18h 17mUnited Airlines

Deal found 12/10

$310

Mon 12/223:15 pmHRL - SEA

1 stop10h 16mDelta

Deal found 12/10

$360

Sat 12/205:00 amHRL - SEA

2 stops15h 06mUnited Airlines

Deal found 12/11

$395

Mon 12/228:11 pmHRL - SEA

2 stops27h 24mAmerican Airlines

Deal found 12/10

$418

Find flight deals from Harlingen to Seattle

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$310 (United Airlines)
One-way from	$268 (Sun Country Air)
Popular in	July
Cheapest in	February
Average price	$541

Provider with most accurate pricing for Harlingen Valley Intl-Seattle/Tacoma Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Harlingen Valley Intl-Seattle/Tacoma Intl flights.

Search Deals

From Harlingen Valley Intl to Seattle/Tacoma Intl

Search Deals

One-way flight from Harlingen Valley Intl to Seattle/Tacoma Intl

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($51 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Fri 1/9

5:25 pm-10:59 pm

1 stop7h 34m

Seattle/Tacoma Intl

Fri 1/16

12:57 pm-9:59 pm

1 stop7h 02m

$257

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Sat 2/7

9:20 am-9:12 pm

2 stops13h 52m

Seattle/Tacoma Intl

Mon 2/9

12:57 pm-9:59 pm

1 stop7h 02m

$342

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Tue 5/12

5:18 pm-10:49 pm

1 stop7h 31m

Seattle/Tacoma Intl

Thu 5/21

5:00 am-3:34 pm

1 stop8h 34m

$413

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Wed 12/17

5:00 pm-9:36 am

1 stop18h 36m

$268

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Fri 12/19

11:55 am-10:48 pm

1 stop12h 53m

$268

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Thu 12/18

11:49 am-10:48 pm

1 stop12h 59m

$268

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Sat 12/20

8:11 pm-12:57 am

1 stop6h 46m

$270

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Tue 12/23

3:15 pm-11:31 pm

1 stop10h 16m

$270

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Thu 12/18

10:12 am-10:44 pm

2 stops14h 32m

$275

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Compare providers for flights from Harlingen to Seattle

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harlingen to Seattle in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
Priceline	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Harlingen, Texas-Seattle flight deals on Cheapflights vs. eDreams >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, April is the cheapest month in which you can book a flight from Harlingen, Texas to Seattle (average of $196). Flying from Harlingen, Texas to Seattle in July is currently the most expensive (average of $307). 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?

It’s typically best to fly out from Harlingen, Texas to Seattle in the morning. Doing so could potentially save you 28% on the flight price compared to flying at noon, which is usually more expensive.

How much does it cost to fly round-trip from Harlingen, Texas to Seattle?

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from Harlingen to Seattle, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,253 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,008 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,095 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,050 reviews

Southwest

7.9

Good

4,253 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

How long is the flight from Harlingen, Texas to Seattle?
Airlines like United Airlines and American Airlines fly from Harlingen, Texas to Seattle in about 7h. The time it takes to get you to your destination can typically vary by up to 3h 51m. There are 1984 mi between Harlingen, Texas and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from Harlingen, Texas to Seattle round-trip?
Delta, at $187, was found to be the cheapest airline from Harlingen, Texas to Seattle.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is currently priced 55% 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, April is the cheapest month in which you can book a flight from Harlingen, Texas to Seattle (average of $196). Flying from Harlingen, Texas to Seattle in July is currently the most expensive (average of $307). 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

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Other flights to Seattle

Top 4 airlines flying from Harlingen to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$187	Average$297	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$228	Average$403	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$278	Average$495	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$328	Average$603	FlexibilityNo cancel fee	On-time63%

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$257+ Cheap flights from Harlingen, TX to Seattle (HRL - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Harlingen to Seattle with Cheapflights

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3. Compare prices and book

Cheap flight deals from Harlingen to Seattle

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 December 12, 2025.

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 December 12, 2025.

Find flight deals from Harlingen to Seattle

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 December.

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.

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?

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

How much does it cost to fly round-trip from Harlingen, Texas to Seattle?

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from Harlingen to Seattle, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.

How long is the flight from Harlingen, Texas to Seattle?

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

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

How can I find direct flights from Harlingen to Seattle?

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

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

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Top 4 airlines flying from Harlingen to Seattle

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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 December 12, 2025.