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Cheap flights from Harlingen, Texas to Seattle from $287

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen, Texas to Seattle departing on 1/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Harlingen, Texas to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:02 am - 11:01 amHRL-SEA
6h 59m1 stop
American Airlines Logo
6:00 am - 2:52 pmSEA-HRL
6h 52m1 stop
$287American Airlines
Find Deal
Tue, Jan 27 - Sat, Jan 31
American Airlines Logo
3:22 pm - 9:47 pmHRL-SEA
8h 25m1 stop
American Airlines Logo
11:25 am - 11:21 pmSEA-HRL
9h 56m2 stops
$292American Airlines
Find Deal
Tue, Jan 27 - Sat, Jan 31
United Airlines Logo
9:20 am - 7:55 pmHRL-SEA
12h 35m2 stops
United Airlines Logo
8:40 am - 9:59 pmSEA-HRL
11h 19m2 stops
$337United Airlines
Find Deal
Tue, Jan 27 - Sat, Jan 31
United Airlines Logo
9:20 am - 9:12 pmHRL-SEA
13h 52m3 stops
United Airlines Logo
5:00 am - 4:06 pmSEA-HRL
9h 06m2 stops
$342United Airlines
Find Deal
Tue, Jan 27 - Sat, Jan 31
American Airlines Logo
8:02 pm - 10:44 amHRL-SEA
16h 42m1 stop
American Airlines Logo
5:00 pm - 9:41 amSEA-HRL
14h 41m1 stop
$649American Airlines
Find Deal
Mon, Dec 1 - Fri, Dec 5
American Airlines Logo
8:02 pm - 10:44 amHRL-SEA
16h 42m1 stop
American Airlines Logo
12:31 am - 11:40 amSEA-HRL
9h 09m1 stop
$682American Airlines
Find Deal
Mon, Dec 1 - Thu, Dec 4
United Airlines Logo
5:00 pm - 12:28 pmHRL-SEA
21h 28m3 stops
United Airlines Logo
11:59 pm - 11:04 amSEA-HRL
9h 05m1 stop
$707United Airlines
Find Deal
Mon, Dec 1 - Fri, Dec 5
United Airlines Logo
5:00 pm - 12:28 pmHRL-SEA
21h 28m3 stops
United Airlines Logo
9:05 am - 9:54 pmSEA-HRL
10h 49m2 stops
$713United Airlines
Find Deal
Mon, Dec 1 - Fri, Dec 5
United Airlines Logo
5:00 pm - 10:09 amHRL-SEA
19h 09m2 stops
United Airlines Logo
11:59 pm - 11:04 amSEA-HRL
9h 05m1 stop
$721United Airlines
Find Deal
Mon, Dec 1 - Fri, Dec 5
United Airlines Logo
5:00 pm - 12:28 pmHRL-SEA
21h 28m3 stops
United Airlines Logo
7:34 pm - 9:54 pmSEA-HRL
24h 20m3 stops
$788United Airlines
Find Deal
Mon, Dec 1 - Fri, Dec 5

American Airlines flights from Harlingen, Texas to Seattle

Our best American Airlines deals on Harlingen, Texas to Seattle flight tickets
American Airlines
Jan 27
HRL6:02 amHarlingen Valley Intl
6h 59m
1 stop
SEA11:01 amSeattle/Tacoma Intl
Jan 31
SEA6:00 amSeattle/Tacoma Intl
6h 52m
1 stop
HRL2:52 pmHarlingen Valley Intl
$287
Find similar
American Airlines
Jan 27
HRL3:22 pmHarlingen Valley Intl
8h 25m
1 stop
SEA9:47 pmSeattle/Tacoma Intl
Jan 31
SEA11:25 amSeattle/Tacoma Intl
9h 56m
2 stops
HRL11:21 pmHarlingen Valley Intl
$292
Find similar
American Airlines
Dec 1
HRL8:02 pmHarlingen Valley Intl
16h 42m
1 stop
SEA10:44 amSeattle/Tacoma Intl
Dec 5
SEA5:00 pmSeattle/Tacoma Intl
14h 41m
1 stop
HRL9:41 amHarlingen Valley Intl
$649
Find similar

United Airlines flights from Harlingen, Texas to Seattle

Our best United Airlines deals on Harlingen, Texas to Seattle flight tickets
United Airlines
Jan 27
HRL9:20 amHarlingen Valley Intl
12h 35m
2 stops
SEA7:55 pmSeattle/Tacoma Intl
Jan 31
SEA8:40 amSeattle/Tacoma Intl
11h 19m
2 stops
HRL9:59 pmHarlingen Valley Intl
$337
Find similar
United Airlines
Jan 27
HRL9:20 amHarlingen Valley Intl
13h 52m
3 stops
SEA9:12 pmSeattle/Tacoma Intl
Jan 31
SEA5:00 amSeattle/Tacoma Intl
9h 06m
2 stops
HRL4:06 pmHarlingen Valley Intl
$342
Find similar
United Airlines
Dec 1
HRL5:00 pmHarlingen Valley Intl
21h 28m
3 stops
SEA12:28 pmSeattle/Tacoma Intl
Dec 5
SEA11:59 pmSeattle/Tacoma Intl
9h 05m
1 stop
HRL11:04 amHarlingen Valley Intl
$707
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Harlingen, Texas 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, momondo users made 832,500 searches. Data last updated November 17, 2025.
Use the filters below to find and compare flights from Harlingen, Texas to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Tue 1/27

6:02 am-11:01 am

1 stop6h 59m

Seattle/Tacoma Intl

Sat 1/31

6:00 am-2:52 pm

1 stop6h 52m

$287

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Tue 1/27

3:22 pm-9:47 pm

1 stop8h 25m

Seattle/Tacoma Intl

Sat 1/31

11:25 am-11:21 pm

2 stops9h 56m

$292

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Tue 1/27

9:20 am-7:55 pm

2 stops12h 35m

Seattle/Tacoma Intl

Sat 1/31

8:40 am-9:59 pm

2 stops11h 19m

$337

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Tue 1/27

9:20 am-9:12 pm

3 stops13h 52m

Seattle/Tacoma Intl

Sat 1/31

5:00 am-4:06 pm

2 stops9h 06m

$342

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mon 12/1

8:02 pm-10:44 am

1 stop16h 42m

Seattle/Tacoma Intl

Fri 12/5

5:00 pm-9:41 am

1 stop14h 41m

$649

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mon 12/1

8:02 pm-10:44 am

1 stop16h 42m

Seattle/Tacoma Intl

Thu 12/4

12:31 am-11:40 am

1 stop9h 09m

$682

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mon 12/1

5:00 pm-12:28 pm

3 stops21h 28m

Seattle/Tacoma Intl

Fri 12/5

11:59 pm-11:04 am

1 stop9h 05m

$707

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mon 12/1

5:00 pm-12:28 pm

3 stops21h 28m

Seattle/Tacoma Intl

Fri 12/5

9:05 am-9:54 pm

2 stops10h 49m

$713

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mon 12/1

5:00 pm-10:09 am

2 stops19h 09m

Seattle/Tacoma Intl

Fri 12/5

11:59 pm-11:04 am

1 stop9h 05m

$721

HarlingenSeattle

HRL - SEA

HRLSEA

Harlingen Valley Intl

Mon 12/1

5:00 pm-12:28 pm

3 stops21h 28m

Seattle/Tacoma Intl

Fri 12/5

7:34 pm-9:54 pm

3 stops24h 20m

$788

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Seattle from

How to get the cheapest flight ticket from Harlingen, Texas to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Harlingen, Texas to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $263. If you don’t want to visit Seattle in February, then you should wait until March to fly from Harlingen, Texas, when ticket prices are also cheap, with an average price of $297.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Harlingen, Texas is on a Thursday. momondo users have found tickets for Thursday departures for as low as $355. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Harlingen, Texas because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $552.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Harlingen, Texas in the morning is the least expensive time of day to depart. momondo users have found prices as low as $452 when looking at flights departing in the morning. Flights to Seattle are more costly at noon, with an average ticket price of $630. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Harlingen, Texas to Seattle flights?

You could potentially save up to 44% on your flight if you consider stops on a Harlingen, Texas to Seattle flight.

How have Harlingen, Texas to Seattle flight prices changed over time?

When to book flights from Harlingen, Texas to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Harlingen, Texas to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Harlingen, Texas to Seattle (HRL to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harlingen, Texas to Seattle

Direct flights

None
There are no direct flights from Harlingen, Texas to Seattle. There are no popular flight routes from Harlingen, Texas to Seattle.
Search flight deals

  • How far is Harlingen Valley Intl to Seattle/Tacoma Intl by plane?

    The distance between Harlingen Valley Intl and Seattle/Tacoma Intl is about 1992.5 mi. In terms of flight time, this usually takes a little over 6h 59m.

  • When did momondo last update prices for flights from Harlingen Valley Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Harlingen Valley Intl Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Harlingen Valley Intl Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Harlingen Valley Intl Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harlingen Valley Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Harlingen, Texas to Seattle?

Best airlines flying from Harlingen, Texas to Seattle

Compare and see reviews for airlines that fly from Harlingen, Texas to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $187Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $271Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
United AirlinesPriceFrom $278Free CancellationRating
7.4
9,013 reviews
Search United Airlines flights
SouthwestPriceFrom $328Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
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Leavenworth
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Federal Way
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Why use momondo?

Why should I use momondo to find a flight deal from Harlingen to Seattle?

It is quick and easy to find Harlingen to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights from Harlingen to Seattle with flexible booking policies on momondo?

Flights from Harlingen to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Harlingen to Seattle?

Once all potential Harlingen to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Harlingen to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Harlingen to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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