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Cheap flights from Seattle to Harlingen from $207

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 12/6. 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

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Delta Logo
6:00 am - 3:10 pmSEA-HRL
7h 10m1 stop
Delta Logo
3:41 pm - 12:24 amHRL-SEA
10h 43m1 stop
$207Delta
Find Deal
Sat, Dec 6 - Thu, Dec 11
American Airlines Logo
12:31 am - 9:38 amSEA-HRL
7h 07m1 stop
American Airlines Logo
5:36 am - 10:43 amHRL-SEA
7h 07m1 stop
$238American Airlines
Find Deal
Wed, Dec 10 - Tue, Dec 16
Delta Logo
6:00 am - 3:10 pmSEA-HRL
7h 10m1 stop
Delta Logo
3:41 pm - 12:24 amHRL-SEA
10h 43m1 stop
$239Delta
Find Deal
Sat, Dec 6 - Fri, Dec 12
United Airlines Logo
11:59 pm - 11:04 amSEA-HRL
9h 05m1 stop
United Airlines Logo
5:25 pm - 10:59 pmHRL-SEA
7h 34m1 stop
$247United Airlines
Find Deal
Sat, Dec 13 - Thu, Jan 8
United Airlines Logo
11:59 pm - 11:04 amSEA-HRL
9h 05m1 stop
United Airlines Logo
12:16 pm - 11:15 pmHRL-SEA
12h 59m2 stops
$252United Airlines
Find Deal
Fri, Dec 12 - Tue, Dec 16
Delta Logo
6:00 am - 3:10 pmSEA-HRL
7h 10m1 stop
Delta Logo
3:41 pm - 12:24 amHRL-SEA
10h 43m1 stop
$268Delta
Find Deal
Sat, Dec 6 - Sun, Dec 7
United Airlines Logo
12:40 pm - 9:59 pmSEA-HRL
7h 19m1 stop
United Airlines Logo
5:20 pm - 11:00 pmHRL-SEA
7h 40m1 stop
$276United Airlines
Find Deal
Sun, Feb 8 - Wed, Feb 18
American Airlines Logo
2:19 pm - 11:11 pmSEA-HRL
6h 52m1 stop
American Airlines Logo
6:10 pm - 11:38 pmHRL-SEA
7h 28m1 stop
$287American Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
American Airlines Logo
11:34 am - 10:51 pmSEA-HRL
9h 17m1 stop
American Airlines Logo
4:02 pm - 8:58 pmHRL-SEA
6h 56m1 stop
$297American Airlines
Find Deal
Thu, Dec 4 - Sat, Dec 13
Delta Logo
6:10 pm - 2:46 pmSEA-HRL
18h 36m1 stop
Delta Logo
3:41 pm - 12:24 amHRL-SEA
10h 43m1 stop
$300Delta
Find Deal
Thu, Dec 4 - Thu, Dec 11

United Airlines flights from Seattle to Harlingen, Texas

Our best United Airlines deals on Seattle to Harlingen, Texas flight tickets
United Airlines
Dec 13
SEA11:59 pmSeattle/Tacoma Intl
9h 05m
1 stop
HRL11:04 amHarlingen Valley Intl
Jan 8
HRL5:25 pmHarlingen Valley Intl
7h 34m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$247
Find similar
United Airlines
Dec 12
SEA11:59 pmSeattle/Tacoma Intl
9h 05m
1 stop
HRL11:04 amHarlingen Valley Intl
Dec 16
HRL12:16 pmHarlingen Valley Intl
12h 59m
2 stops
SEA11:15 pmSeattle/Tacoma Intl
$252
Find similar
United Airlines
Feb 8
SEA12:40 pmSeattle/Tacoma Intl
7h 19m
1 stop
HRL9:59 pmHarlingen Valley Intl
Feb 18
HRL5:20 pmHarlingen Valley Intl
7h 40m
1 stop
SEA11:00 pmSeattle/Tacoma Intl
$276
Find similar

American Airlines flights from Seattle to Harlingen, Texas

Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets
American Airlines
Dec 10
SEA12:31 amSeattle/Tacoma Intl
7h 07m
1 stop
HRL9:38 amHarlingen Valley Intl
Dec 16
HRL5:36 amHarlingen Valley Intl
7h 07m
1 stop
SEA10:43 amSeattle/Tacoma Intl
$238
Find similar
American Airlines
Dec 6
SEA7:15 amSeattle/Tacoma Intl
8h 24m
1 stop
HRL5:39 pmHarlingen Valley Intl
Dec 10
HRL6:10 pmHarlingen Valley Intl
7h 28m
1 stop
SEA11:38 pmSeattle/Tacoma Intl
$287
Find similar
American Airlines
Dec 4
SEA5:18 amSeattle/Tacoma Intl
8h 11m
1 stop
HRL3:29 pmHarlingen Valley Intl
Dec 10
HRL12:13 pmHarlingen Valley Intl
7h 38m
1 stop
SEA5:51 pmSeattle/Tacoma Intl
$297
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 November 13, 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

Sat 12/6

6:00 am-3:10 pm

1 stop7h 10m

Harlingen Valley Intl

Thu 12/11

3:41 pm-12:24 am

1 stop10h 43m

$207

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 12/10

12:31 am-9:38 am

1 stop7h 07m

Harlingen Valley Intl

Tue 12/16

5:36 am-10:43 am

1 stop7h 07m

$238

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 12/6

6:00 am-3:10 pm

1 stop7h 10m

Harlingen Valley Intl

Fri 12/12

3:41 pm-12:24 am

1 stop10h 43m

$239

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 12/13

11:59 pm-11:04 am

1 stop9h 05m

Harlingen Valley Intl

Thu 1/8

5:25 pm-10:59 pm

1 stop7h 34m

$247

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 12/12

11:59 pm-11:04 am

1 stop9h 05m

Harlingen Valley Intl

Tue 12/16

12:16 pm-11:15 pm

2 stops12h 59m

$252

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 12/6

6:00 am-3:10 pm

1 stop7h 10m

Harlingen Valley Intl

Sun 12/7

3:41 pm-12:24 am

1 stop10h 43m

$268

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sun 2/8

12:40 pm-9:59 pm

1 stop7h 19m

Harlingen Valley Intl

Wed 2/18

5:20 pm-11:00 pm

1 stop7h 40m

$276

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 12/6

2:19 pm-11:11 pm

1 stop6h 52m

Harlingen Valley Intl

Tue 12/9

6:10 pm-11:38 pm

1 stop7h 28m

$287

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 12/4

11:34 am-10:51 pm

1 stop9h 17m

Harlingen Valley Intl

Sat 12/13

4:02 pm-8:58 pm

1 stop6h 56m

$297

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 12/4

6:10 pm-2:46 pm

1 stop18h 36m

Harlingen Valley Intl

Thu 12/11

3:41 pm-12:24 am

1 stop10h 43m

$300

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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.
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 6h 31m.

  • 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
11,051 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,017 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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