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Cheap flights from Seattle to Harlingen from $169

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 11/19. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
6:05 am - 6:00 pmSEA-HRL
9h 55m2 stops
Southwest Logo
12:15 pm - 8:20 pmHRL-SEA
10h 05m2 stops
$229Southwest
Find Deal
Wed, Jan 7 - Mon, Jan 12
American Airlines Logo
8:35 am - 6:13 pmSEA-HRL
7h 38m1 stop
American Airlines Logo
11:06 am - 5:35 pmHRL-SEA
8h 29m1 stop
$237American Airlines
Find Deal
Wed, Jan 7 - Mon, Jan 12
United Airlines Logo
7:00 am - 4:06 pmSEA-HRL
7h 06m1 stop
United Airlines Logo
12:10 pm - 9:12 pmHRL-SEA
11h 02m2 stops
$245United Airlines
Find Deal
Wed, Jan 7 - Mon, Jan 12
American Airlines Logo
1:35 am - 9:42 amSEA-HRL
6h 07m1 stop
American Airlines Logo
8:00 pm - 12:57 amHRL-SEA
6h 57m1 stop
$267American Airlines
Find Deal
Wed, Feb 25 - Wed, Mar 4
American Airlines Logo
1:33 am - 9:45 amSEA-HRL
6h 12m1 stop
American Airlines Logo
7:55 pm - 12:49 amHRL-SEA
6h 54m1 stop
$287American Airlines
Find Deal
Mon, Mar 9 - Wed, Mar 11
Southwest Logo
11:00 am - 10:10 pmSEA-HRL
9h 10m2 stops
Southwest Logo
7:35 am - 5:50 pmHRL-SEA
12h 15m2 stops
$294Southwest
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Thu, Feb 26 - Wed, Mar 4
American Airlines Logo
5:43 am - 4:13 pmSEA-HRL
8h 30m1 stop
American Airlines Logo
8:00 pm - 12:57 amHRL-SEA
6h 57m1 stop
$298American Airlines
Find Deal
Thu, Feb 26 - Wed, Mar 4
American Airlines Logo
6:00 am - 2:46 pmSEA-HRL
6h 46m1 stop
American Airlines Logo
11:06 am - 5:35 pmHRL-SEA
8h 29m1 stop
$307American Airlines
Find Deal
Tue, Jan 6 - Mon, Jan 12
United Airlines Logo
7:00 am - 9:44 pmSEA-HRL
12h 44m2 stops
United Airlines Logo
9:20 am - 6:27 pmHRL-SEA
11h 07m2 stops
$337United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
9:25 am - 9:59 pmSEA-HRL
10h 34m2 stops
United Airlines Logo
12:10 pm - 9:12 pmHRL-SEA
11h 02m2 stops
$340United Airlines
Find Deal
Wed, Jan 7 - Mon, Jan 12

American Airlines flights from Seattle to Harlingen, Texas

Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets
American Airlines
Jan 7
SEA8:35 amSeattle/Tacoma Intl
7h 38m
1 stop
HRL6:13 pmHarlingen Valley Intl
Jan 12
HRL11:06 amHarlingen Valley Intl
8h 29m
1 stop
SEA5:35 pmSeattle/Tacoma Intl
$237
Find similar
American Airlines
Feb 25
SEA1:35 amSeattle/Tacoma Intl
6h 07m
1 stop
HRL9:42 amHarlingen Valley Intl
Mar 4
HRL8:00 pmHarlingen Valley Intl
6h 57m
1 stop
SEA12:57 amSeattle/Tacoma Intl
$267
Find similar
American Airlines
Mar 9
SEA1:33 amSeattle/Tacoma Intl
6h 12m
1 stop
HRL9:45 amHarlingen Valley Intl
Mar 11
HRL7:55 pmHarlingen Valley Intl
6h 54m
1 stop
SEA12:49 amSeattle/Tacoma Intl
$287
Find similar

Southwest flights from Seattle to Harlingen, Texas

Our best Southwest deals on Seattle to Harlingen, Texas flight tickets
Southwest
Jan 7
SEA6:05 amSeattle/Tacoma Intl
9h 55m
2 stops
HRL6:00 pmHarlingen Valley Intl
Jan 12
HRL12:15 pmHarlingen Valley Intl
10h 05m
2 stops
SEA8:20 pmSeattle/Tacoma Intl
$229
Find similar
Southwest
Feb 26
SEA11:00 amSeattle/Tacoma Intl
9h 10m
2 stops
HRL10:10 pmHarlingen Valley Intl
Mar 4
HRL7:35 amHarlingen Valley Intl
12h 15m
2 stops
SEA5:50 pmSeattle/Tacoma Intl
$294
Find similar
Southwest
Jan 6
SEA5:15 amSeattle/Tacoma Intl
9h 50m
2 stops
HRL5:05 pmHarlingen Valley Intl
Jan 12
HRL6:30 amHarlingen Valley Intl
11h 30m
2 stops
SEA4:00 pmSeattle/Tacoma Intl
$335
Find similar

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 October 23, 2025.
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

Wed 1/7

6:05 am-6:00 pm

2 stops9h 55m

Harlingen Valley Intl

Mon 1/12

12:15 pm-8:20 pm

2 stops10h 05m

$229

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 1/7

8:35 am-6:13 pm

1 stop7h 38m

Harlingen Valley Intl

Mon 1/12

11:06 am-5:35 pm

1 stop8h 29m

$237

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 1/7

7:00 am-4:06 pm

1 stop7h 06m

Harlingen Valley Intl

Mon 1/12

12:10 pm-9:12 pm

2 stops11h 02m

$245

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 2/25

1:35 am-9:42 am

1 stop6h 07m

Harlingen Valley Intl

Wed 3/4

8:00 pm-12:57 am

1 stop6h 57m

$267

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Mon 3/9

1:33 am-9:45 am

1 stop6h 12m

Harlingen Valley Intl

Wed 3/11

7:55 pm-12:49 am

1 stop6h 54m

$287

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 2/26

11:00 am-10:10 pm

2 stops9h 10m

Harlingen Valley Intl

Wed 3/4

7:35 am-5:50 pm

2 stops12h 15m

$294

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 2/26

5:43 am-4:13 pm

1 stop8h 30m

Harlingen Valley Intl

Wed 3/4

8:00 pm-12:57 am

1 stop6h 57m

$298

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 1/6

6:00 am-2:46 pm

1 stop6h 46m

Harlingen Valley Intl

Mon 1/12

11:06 am-5:35 pm

1 stop8h 29m

$307

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 3/10

7:00 am-9:44 pm

2 stops12h 44m

Harlingen Valley Intl

Wed 3/11

9:20 am-6:27 pm

2 stops11h 07m

$337

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 1/7

9:25 am-9:59 pm

2 stops10h 34m

Harlingen Valley Intl

Mon 1/12

12:10 pm-9:12 pm

2 stops11h 02m

$340

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Harlingen from

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

What is the cheapest day to depart on your flight to Harlingen, Texas?

The cheapest day to depart on your flight to Harlingen, Texas is on a Thursday when prices can be found for as low as $402. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Harlingen, Texas for around $873.

What is the cheapest time of day to depart on your flight to Harlingen, Texas?

Our most recent data shows that the best time of day to fly to Harlingen, Texas is at noon. Flights from Seattle to Harlingen, Texas during this time can be as low as $364. Flights in the afternoon are often more expensive with an average ticket price of $636.

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

You could potentially save up to 60% 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

Direct flights

None
There are no direct flights from Seattle to Harlingen, Texas. There are no popular flight routes from Seattle to Harlingen, Texas.
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  • 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 6h 07m.

  • 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
11,033 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
8,995 reviews
Search United Airlines flights
SouthwestPriceFrom $299Free CancellationRating
8.0
4,236 reviews
Search Southwest 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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