What airlines fly to Harlingen, Texas?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Harlingen, Texas from Seattle according to our data. American Airlines is the first choice among our users, with 73% of people opting to fly with this airline when traveling to Harlingen, Texas. Keep in mind that there are 3 different airlines that fly to Harlingen, Texas on a routine basis, so you have a few additional options to choose from.

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?

There are 2 operators available for flights from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport as of January 2026.

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.

$242 Cheap Flights from Seattle to Harlingen in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Harlingen

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:20 am - 7:40 pm

SEA

HRL

11h 20m

2 stops

12:05 pm - 7:42 pm

HRL

SEA

9h 37m

1 stop

$242United Airlines

Tue, Mar 31 - Tue, Apr 7

6:30 am - 4:04 pm

SEA

HRL

7h 34m

1 stop

12:05 pm - 7:42 pm

HRL

SEA

9h 37m

1 stop

$277United Airlines

Tue, Mar 31 - Tue, Apr 7

6:20 am - 7:40 pm

SEA

HRL

11h 20m

2 stops

12:05 pm - 8:57 pm

HRL

SEA

10h 52m

2 stops

$287United Airlines

Tue, Mar 31 - Tue, Apr 7

11:55 pm - 10:17 am

SEA

HRL

8h 22m

1 stop

7:53 pm - 12:44 am

HRL

SEA

6h 51m

1 stop

$300American Airlines

Sat, Apr 11 - Fri, Apr 17

7:35 am - 6:14 pm

SEA

HRL

8h 39m

1 stop

6:44 pm - 11:51 pm

HRL

SEA

7h 07m

1 stop

$359American Airlines

Thu, Feb 5 - Mon, Feb 9

6:00 am - 6:14 pm

SEA

HRL

10h 14m

2 stops

6:44 pm - 11:51 pm

HRL

SEA

7h 07m

1 stop

$364American Airlines

Thu, Feb 5 - Mon, Feb 9

6:40 am - 7:55 pm

SEA

HRL

11h 15m

2 stops

6:00 pm - 12:40 am

HRL

SEA

8h 40m

2 stops

$400Southwest

Sat, Apr 11 - Fri, Apr 17

6:20 am - 7:40 pm

SEA

HRL

11h 20m

2 stops

5:18 pm - 11:27 pm

HRL

SEA

32h 09m

3 stops

$401United Airlines

Tue, Mar 31 - Tue, Apr 7

12:59 am - 10:12 am

SEA

HRL

7h 13m

1 stop

8:06 pm - 12:55 am

HRL

SEA

6h 49m

1 stop

$449American Airlines

Wed, Apr 1 - Mon, Apr 6

12:57 pm - 9:59 pm

SEA

HRL

7h 02m

1 stop

9:20 am - 9:12 pm

HRL

SEA

13h 52m

3 stops

$460United Airlines

Fri, Feb 6 - Tue, Feb 10

United Airlines flights from Seattle to Harlingen, Texas

Our best United Airlines deals on Seattle to Harlingen, Texas flight tickets

United Airlines

Mar 31

SEA6:20 amSeattle/Tacoma Intl

11h 20m

2 stops

HRL7:40 pmHarlingen Valley Intl

Apr 7

HRL12:05 pmHarlingen Valley Intl

9h 37m

1 stop

SEA7:42 pmSeattle/Tacoma Intl

$242

United Airlines

Mar 31

SEA6:30 amSeattle/Tacoma Intl

7h 34m

1 stop

HRL4:04 pmHarlingen Valley Intl

Apr 7

HRL12:05 pmHarlingen Valley Intl

9h 37m

1 stop

SEA7:42 pmSeattle/Tacoma Intl

$277

United Airlines

Mar 31

SEA6:20 amSeattle/Tacoma Intl

11h 20m

2 stops

HRL7:40 pmHarlingen Valley Intl

Apr 7

HRL12:05 pmHarlingen Valley Intl

10h 52m

2 stops

SEA8:57 pmSeattle/Tacoma Intl

$287

American Airlines flights from Seattle to Harlingen, Texas

Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets

American Airlines

Apr 11

SEA11:55 pmSeattle/Tacoma Intl

8h 22m

1 stop

HRL10:17 amHarlingen Valley Intl

Apr 17

HRL7:53 pmHarlingen Valley Intl

6h 51m

1 stop

SEA12:44 amSeattle/Tacoma Intl

$300

American Airlines

Feb 5

SEA7:35 amSeattle/Tacoma Intl

8h 39m

1 stop

HRL6:14 pmHarlingen Valley Intl

Feb 9

HRL6:44 pmHarlingen Valley Intl

7h 07m

1 stop

SEA11:51 pmSeattle/Tacoma Intl

$359

American Airlines

Feb 5

SEA6:00 amSeattle/Tacoma Intl

10h 14m

2 stops

HRL6:14 pmHarlingen Valley Intl

Feb 9

HRL6:44 pmHarlingen Valley Intl

7h 07m

1 stop

SEA11:51 pmSeattle/Tacoma Intl

$364

Fly from

Fly to

Route

Depart

Return

Price

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 3/31

6:20 am-7:40 pm

2 stops11h 20m

Harlingen Valley Intl

Tue 4/7

12:05 pm-7:42 pm

1 stop9h 37m

$242

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 3/31

6:30 am-4:04 pm

1 stop7h 34m

Harlingen Valley Intl

Tue 4/7

12:05 pm-7:42 pm

1 stop9h 37m

$277

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 3/31

6:20 am-7:40 pm

2 stops11h 20m

Harlingen Valley Intl

Tue 4/7

12:05 pm-8:57 pm

2 stops10h 52m

$287

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 4/11

11:55 pm-10:17 am

1 stop8h 22m

Harlingen Valley Intl

Fri 4/17

7:53 pm-12:44 am

1 stop6h 51m

$300

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 2/5

7:35 am-6:14 pm

1 stop8h 39m

Harlingen Valley Intl

Mon 2/9

6:44 pm-11:51 pm

1 stop7h 07m

$359

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Thu 2/5

6:00 am-6:14 pm

2 stops10h 14m

Harlingen Valley Intl

Mon 2/9

6:44 pm-11:51 pm

1 stop7h 07m

$364

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Sat 4/11

6:40 am-7:55 pm

2 stops11h 15m

Harlingen Valley Intl

Fri 4/17

6:00 pm-12:40 am

2 stops8h 40m

$400

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Tue 3/31

6:20 am-7:40 pm

2 stops11h 20m

Harlingen Valley Intl

Tue 4/7

5:18 pm-11:27 pm

3 stops32h 09m

$401

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Wed 4/1

12:59 am-10:12 am

1 stop7h 13m

Harlingen Valley Intl

Mon 4/6

8:06 pm-12:55 am

1 stop6h 49m

$449

SeattleHarlingen

SEA - HRL

SEAHRL

Seattle/Tacoma Intl

Fri 2/6

12:57 pm-9:59 pm

1 stop7h 02m

Harlingen Valley Intl

Tue 2/10

9:20 am-9:12 pm

3 stops13h 52m

$460

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Prices

Airlines

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

You could potentially save up to 56% 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?
There are 2 operators available for flights from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport as of January 2026.
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?
momondo data reveals that the most frequently booked airline on the route from Seattle to Harlingen, Texas is American Airlines, representing 80% of all bookings. The subsequent popular airline is United Airlines at 20%.

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 Airlines	PriceFrom $225	Free Cancellation	Rating 7.2 11,176 reviews		Search American Airlines flights
United Airlines	PriceFrom $246	Free Cancellation	Rating 7.4 9,195 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.