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Cheap flights from Seattle to Harlingen from $119

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 3/2. 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 Seattle to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$307American Airlines
Fri, Feb 27 - Wed, Mar 11
American Airlines Logo
7:29 pm - 10:12 am
SEA
-
HRL
12h 43m
2 stops
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$312American Airlines
Tue, Mar 3 - Wed, Mar 11
American Airlines Logo
11:57 pm - 10:12 am
SEA
-
HRL
8h 15m
1 stop
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$317American Airlines
Fri, Feb 27 - Wed, Mar 11
American Airlines Logo
7:29 pm - 10:12 am
SEA
-
HRL
12h 43m
2 stops
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$322American Airlines
Mon, Mar 2 - Wed, Mar 11
United Airlines Logo
6:30 am - 4:04 pm
SEA
-
HRL
7h 34m
1 stop
United Airlines Logo
12:05 pm - 7:42 pm
HRL
-
SEA
9h 37m
1 stop
$327United Airlines
Wed, Apr 8 - Fri, Apr 17
United Airlines Logo
7:37 pm - 11:23 am
SEA
-
HRL
13h 46m
2 stops
United Airlines Logo
5:18 pm - 10:50 pm
HRL
-
SEA
7h 32m
1 stop
$332United Airlines
Tue, Apr 7 - Thu, Apr 16
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
8:03 pm - 12:44 am
HRL
-
SEA
6h 41m
1 stop
$337American Airlines
Mon, Mar 30 - Wed, Apr 8
American Airlines Logo
7:29 pm - 10:12 am
SEA
-
HRL
12h 43m
2 stops
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$342American Airlines
Sun, Mar 1 - Wed, Mar 11
American Airlines Logo
12:59 am - 10:17 am
SEA
-
HRL
7h 18m
1 stop
American Airlines Logo
7:53 pm - 12:44 am
HRL
-
SEA
6h 51m
1 stop
$347American Airlines
Wed, Apr 8 - Thu, Apr 16
American Airlines Logo
7:29 pm - 10:12 am
SEA
-
HRL
12h 43m
2 stops
American Airlines Logo
8:06 pm - 12:55 am
HRL
-
SEA
6h 49m
1 stop
$352American Airlines
Sun, Mar 1 - Mon, Mar 9

United Airlines flights from Seattle to Harlingen, Texas

Our best United Airlines deals on Seattle to Harlingen, Texas flight tickets
United Airlines
Apr 8
SEA6:30 amSeattle/Tacoma Intl
7h 34m
1 stop
HRL4:04 pmHarlingen Valley Intl
Apr 15
HRL12:05 pmHarlingen Valley Intl
9h 37m
1 stop
SEA7:42 pmSeattle/Tacoma Intl
$327
United Airlines
Apr 7
SEA7:37 pmSeattle/Tacoma Intl
13h 46m
2 stops
HRL11:23 amHarlingen Valley Intl
Apr 16
HRL5:18 pmHarlingen Valley Intl
7h 32m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
$332
United Airlines
Feb 28
SEA7:00 amSeattle/Tacoma Intl
12h 59m
2 stops
HRL9:59 pmHarlingen Valley Intl
Mar 11
HRL12:10 pmHarlingen Valley Intl
14h 49m
2 stops
SEA12:59 amSeattle/Tacoma Intl
$397

American Airlines flights from Seattle to Harlingen, Texas

Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets
American Airlines
Feb 27
SEA12:59 amSeattle/Tacoma Intl
7h 13m
1 stop
HRL10:12 amHarlingen Valley Intl
Mar 11
HRL8:06 pmHarlingen Valley Intl
6h 49m
1 stop
SEA12:55 amSeattle/Tacoma Intl
$307
American Airlines
Mar 3
SEA7:29 pmSeattle/Tacoma Intl
12h 43m
2 stops
HRL10:12 amHarlingen Valley Intl
Mar 11
HRL8:06 pmHarlingen Valley Intl
6h 49m
1 stop
SEA12:55 amSeattle/Tacoma Intl
$312
American Airlines
Feb 27
SEA11:57 pmSeattle/Tacoma Intl
8h 15m
1 stop
HRL10:12 amHarlingen Valley Intl
Mar 11
HRL8:06 pmHarlingen Valley Intl
6h 49m
1 stop
SEA12:55 amSeattle/Tacoma Intl
$317

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Harlingen, Texas 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 February 4, 2026.
Use the filters below to find and compare flights from Seattle to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 2/27

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

Wed 3/11

8:06 pm-12:55 am

1 stop6h 49m

$307

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 3/3

7:29 pm-10:12 am

2 stops12h 43m

Harlingen Valley Intl

Wed 3/11

8:06 pm-12:55 am

1 stop6h 49m

$312

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 2/27

11:57 pm-10:12 am

1 stop8h 15m

Harlingen Valley Intl

Wed 3/11

8:06 pm-12:55 am

1 stop6h 49m

$317

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 3/2

7:29 pm-10:12 am

2 stops12h 43m

Harlingen Valley Intl

Wed 3/11

8:06 pm-12:55 am

1 stop6h 49m

$322

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 4/8

6:30 am-4:04 pm

1 stop7h 34m

Harlingen Valley Intl

Fri 4/17

12:05 pm-7:42 pm

1 stop9h 37m

$327

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 4/7

7:37 pm-11:23 am

2 stops13h 46m

Harlingen Valley Intl

Thu 4/16

5:18 pm-10:50 pm

1 stop7h 32m

$332

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 3/30

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

Wed 4/8

8:03 pm-12:44 am

1 stop6h 41m

$337

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sun 3/1

7:29 pm-10:12 am

2 stops12h 43m

Harlingen Valley Intl

Wed 3/11

8:06 pm-12:55 am

1 stop6h 49m

$342

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 4/8

12:59 am-10:17 am

1 stop7h 18m

Harlingen Valley Intl

Thu 4/16

7:53 pm-12:44 am

1 stop6h 51m

$347

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sun 3/1

7:29 pm-10:12 am

2 stops12h 43m

Harlingen Valley Intl

Mon 3/9

8:06 pm-12:55 am

1 stop6h 49m

$352

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to Harlingen, Texas

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

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

You could potentially save up to 4% on your flight if you consider stops on a Seattle to Harlingen, Texas flight.

When to book flights from Seattle to Harlingen, Texas

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

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

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

Fastest flight time

7h 02m

Direct flights

None
The fastest flight from Seattle to Harlingen, Texas takes 7h 02m
There are no direct flights from Seattle to Harlingen, Texas. There are no popular flight routes from Seattle to Harlingen, Texas.
Search flight deals

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

    Harlingen Valley Intl is 1992.5 mi away from Seattle/Tacoma Intl. By plane, this route typically takes 7h 02m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The travel and health documents required for your trip to Harlingen Valley 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 Harlingen Valley 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 Seattle to Harlingen, Texas?

Best airlines flying from Seattle to Harlingen, Texas

Compare and see reviews for airlines that fly from Seattle to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $225Free CancellationRating
7.2
11,222 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Harlingen. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Harlingen from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Harlingen from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Seattle to Harlingen 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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