SEA - HRL

$119 Find Cheap Flights from Seattle to Harlingen

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 3/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Harlingen

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Harlingen, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Harlingen, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$247
Typical prices: $225-$442
United Airlines
Sat 5/9Tue 5/12
SEA - HRL • 2 stops
Cheapest one-way
$119
Typical prices: $146-$192
American Airlines
Mon 3/2
SEA - HRL • 1 stop
Top airlines
United Airlines
Cheapest • from $247 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Harlingen!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Harlingen (SEA-HRL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Harlingen that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Harlingen

Sat, May 9 - Tue, May 12
United Airlines Logo
8:51 am - 8:00 pm
SEA
-
HRL
9h 09m
2 stops
United Airlines Logo
9:20 am - 7:54 pm
HRL
-
SEA
12h 34m
2 stops
$247United Airlines
Sat, May 9 - Tue, May 12
United Airlines Logo
8:45 am - 9:59 pm
SEA
-
HRL
11h 14m
2 stops
United Airlines Logo
12:10 pm - 7:44 pm
HRL
-
SEA
9h 34m
1 stop
$302United Airlines
Wed, Mar 11 - Tue, Mar 24
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
2:36 pm - 9:16 pm
HRL
-
SEA
8h 40m
1 stop
$303American Airlines
Mon, Mar 9 - Wed, Mar 25
United Airlines Logo
11:59 pm - 11:16 am
SEA
-
HRL
9h 17m
1 stop
United Airlines Logo
5:25 pm - 10:59 pm
HRL
-
SEA
7h 34m
1 stop
$327United Airlines
Mon, Mar 9 - Tue, Mar 24
United Airlines Logo
11:59 pm - 11:16 am
SEA
-
HRL
9h 17m
1 stop
United Airlines Logo
9:20 am - 11:16 pm
HRL
-
SEA
15h 56m
2 stops
$332United Airlines
Mon, Mar 9 - Tue, Mar 24
United Airlines Logo
7:35 pm - 11:16 am
SEA
-
HRL
13h 41m
2 stops
United Airlines Logo
12:10 pm - 11:16 pm
HRL
-
SEA
13h 06m
2 stops
$337United Airlines
Wed, Mar 11 - Tue, Mar 24
American Airlines Logo
12:59 am - 10:12 am
SEA
-
HRL
7h 13m
1 stop
American Airlines Logo
10:42 am - 6:53 pm
HRL
-
SEA
10h 11m
2 stops
$341American Airlines
Thu, Mar 12 - Tue, Mar 24
Southwest Logo
5:30 am - 5:50 pm
SEA
-
HRL
10h 20m
2 stops
Southwest Logo
5:05 pm - 12:40 am
HRL
-
SEA
9h 35m
2 stops
$348Southwest
Fri, Apr 10 - Wed, Apr 15
Southwest Logo
5:30 am - 5:25 pm
SEA
-
HRL
9h 55m
2 stops
Southwest Logo
4:40 pm - 11:55 pm
HRL
-
SEA
9h 15m
2 stops
$358Southwest
Sat, May 9 - Tue, May 12
American Airlines Logo
5:43 am - 2:17 pm
SEA
-
HRL
6h 34m
1 stop
American Airlines Logo
2:47 pm - 10:47 pm
HRL
-
SEA
10h 00m
1 stop
$363American Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Harlingen flights

Get data-powered insights and trends into flights from Seattle to Harlingen to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Harlingen, Texas?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Harlingen, Texas departing in May.

Good to know

Low seasonMarch
Cheapest flight$119
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly and prices are also 38% lower on average.
Flight from Seattle to Harlingen

When to book flights from Seattle to Harlingen

Are your dates flexible? Find out the best times to travel from Seattle to Harlingen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Harlingen

  • What is the cheapest flight from Seattle to Harlingen?

    In the last 3 days, the lowest price for a flight from Seattle to Harlingen was $119 for a one-way ticket and $247 for a round-trip.

  • Do I need a passport to fly between Seattle and Harlingen?

    No

  • Which aircraft models fly most regularly from Seattle to Harlingen?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Harlingen?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Harlingen, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Harlingen, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Harlingen are United Airlines and American Airlines. With an average price for the route of $583 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $410 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Seattle to Harlingen?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Harlingen.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Harlingen?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Harlingen?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to Seattle with another airline. Booking your flights between Seattle and HRL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Harlingen?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Seattle to Harlingen

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Harlingen. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Harlingen? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9219 reviews
8.1Crew
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

Delayed, toilets did not flush, pilot parked to far away from Gate

2.0 MediocreLisa, Jan 2026
ELP - IAH
Read more United Airlines reviews

Delayed, toilets did not flush, pilot parked to far away from Gate

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

United is an incompetent airline. They parked the plane on the tarmac for an hour after arriving because they “didn’t have a gate available” it was actually some sort of lie because as we de planed there were approximately 9 open and manned and empty gates that we walked past. Many people on the flight missed connections for the hour long sit on the tarmac. Utterly baffling and incompetent behavior from United flight ops.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Even though we were delayed, we were able to make our connection

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Crew and customer service were excellent. This flight also had plenty of leg room and seat mounted screens for entertainment. A very pleasant flight all around!

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

2 hour delay due to equipment failure. No updates via the app and airport screens (which continued to show a departure time in the past). AA eventually switched planes and the new plane was not catered or cleaned correctly.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

The aircraft had several problems - from excess fuel to non operational ac. Two hours of delay in Chicago could have been avoided with proper planning and aircraft maintenance.

They made me pay $40 to check a bag that was listed as free when I bought my ticket. Then before boarding they offered to check any bags free.

The seats from lax to DFW was so tight that I could not move my legs . No WiFi and had to pay . Not a good selection of entertainment

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

Lower WiFi prices; allow us to see our flight on a map; more variety of drink choices.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

Everything you need to know for your flight from Seattle to Harlingen

Information on your arrival and departure airports