Cheap flights from Seattle to Harlingen from $213
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 10/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Mon 11/9
2:00 pm-10:48 pm
1 stop6h 48m
Harlingen Valley Intl
Sat 11/14
7:10 am-1:25 pm
1 stop8h 15m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Mon 11/9
2:00 pm-10:48 pm
1 stop6h 48m
Harlingen Valley Intl
Sat 11/14
7:10 am-6:46 pm
2 stops13h 36m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Mon 11/9
10:40 am-10:48 pm
2 stops10h 08m
Harlingen Valley Intl
Sat 11/14
5:05 am-2:39 pm
2 stops11h 34m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Tue 11/10
2:00 pm-10:48 pm
1 stop6h 48m
Harlingen Valley Intl
Wed 11/11
5:25 pm-10:51 pm
1 stop7h 26m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Tue 11/10
7:05 am-4:01 pm
1 stop6h 56m
Harlingen Valley Intl
Wed 11/11
5:25 pm-10:51 pm
1 stop7h 26m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Tue 11/10
2:00 pm-10:48 pm
1 stop6h 48m
Harlingen Valley Intl
Wed 11/11
5:05 am-4:12 pm
2 stops13h 07m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Tue 11/10
7:05 am-4:01 pm
1 stop6h 56m
Harlingen Valley Intl
Wed 11/11
5:05 am-6:33 pm
2 stops15h 28m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Tue 11/10
9:05 am-10:48 pm
2 stops11h 43m
Harlingen Valley Intl
Wed 11/11
5:05 am-4:27 pm
2 stops13h 22m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Thu 11/26
5:10 am-2:30 pm
1 stop7h 20m
Harlingen Valley Intl
Mon 11/30
6:46 pm-11:47 pm
1 stop7h 01m
SeattleHarlingen
SEA Seattle/Tacoma Intl - HRL Harlingen Valley Intl
SEAHRL
Seattle/Tacoma Intl
Tue 11/10
2:07 pm-11:31 pm
1 stop7h 24m
Harlingen Valley Intl
Sat 11/14
5:40 am-11:12 am
1 stop7h 32m
See travel insights to Harlingen from
How to get the cheapest flight ticket from Seattle to Harlingen
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 Harlingen?
If you aren’t able to travel during the month of July, then book flights to Harlingen from Seattle during May instead. Flights to Harlingen in May, while not as cheap as those in July, still average around $310.
Can stopping save me money on Seattle to Harlingen flights?
You could potentially save up to 4% on your flight if you consider stops on a Seattle to Harlingen flight.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Harlingen Valley Intl?
United Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Harlingen Valley Intl
What airlines fly to Harlingen?
American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Harlingen 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. Keep in mind that there are 3 different airlines that fly to Harlingen on a routine basis, so you have a few additional options to choose from.
When to book flights from Seattle to Harlingen
Cheap Seattle to Harlingen (SEA to HRL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Harlingen
Frequently asked questions about flying from Seattle to Harlingen
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 48m.
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 is 1 operator available for flights from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport as of October 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?
momondo data reveals that the most frequently booked airline on the route from Seattle to Harlingen is American Airlines, representing 100% of all bookings.
Best airlines flying from Seattle to Harlingen
Compare and see reviews for airlines that fly from Seattle to Harlingen with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $237 | Free Cancellation | Rating 7.0 12,138 reviews |
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.