SEA - HRL

$208 Find Cheap Flights from Seattle to Harlingen - Compare and Save

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 8/4. 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

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$317
Typical prices: $417-$448
American Airlines
Sat 10/17Tue 11/3
SEA - HRL • 1 stop
Cheapest one-way
$208
Typical prices: $213-$356
Southwest
Tue 8/4
SEA - HRL • 1 stop
Top airlines
Cheapest • from $317 (round-trip)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Harlingen. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $490 (round-trip)
Shortest trip • 6h 50m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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, Oct 17 - Tue, Nov 3
American Airlines Logo
5:00 am - 2:17 pm
SEA
-
HRL
7h 17m
1 stop
American Airlines Logo
2:47 pm - 10:11 pm
HRL
-
SEA
9h 24m
1 stop
$317American Airlines
Thu, Sep 10 - Tue, Sep 15
Southwest Logo
12:35 pm - 8:35 pm
SEA
-
HRL
6h 00m
1 stop
Southwest Logo
1:45 pm - 6:35 pm
HRL
-
SEA
6h 50m
1 stop
$317Southwest
Thu, Sep 10 - Tue, Sep 15
Southwest Logo
12:35 pm - 8:35 pm
SEA
-
HRL
6h 00m
1 stop
Southwest Logo
1:45 pm - 11:10 pm
HRL
-
SEA
11h 25m
2 stops
$322Southwest
Thu, Sep 10 - Tue, Sep 15
Southwest Logo
7:00 am - 8:35 pm
SEA
-
HRL
11h 35m
2 stops
Southwest Logo
1:45 pm - 11:10 pm
HRL
-
SEA
11h 25m
2 stops
$348Southwest
Sat, Oct 17 - Tue, Nov 3
Southwest Logo
5:25 am - 7:25 pm
SEA
-
HRL
12h 00m
2 stops
Southwest Logo
7:20 am - 6:25 pm
HRL
-
SEA
13h 05m
1 stop
$349Southwest
Sat, Oct 17 - Tue, Nov 3
Southwest Logo
5:25 am - 7:25 pm
SEA
-
HRL
12h 00m
2 stops
Southwest Logo
7:20 am - 5:45 pm
HRL
-
SEA
12h 25m
2 stops
$354Southwest
Wed, Nov 11 - Sun, Nov 15
Southwest Logo
5:45 am - 5:15 pm
SEA
-
HRL
9h 30m
2 stops
Southwest Logo
4:45 pm - 12:55 am
HRL
-
SEA
10h 10m
2 stops
$358Southwest
Fri, Sep 18 - Sun, Sep 20
American Airlines Logo
5:30 am - 3:05 pm
SEA
-
HRL
7h 35m
1 stop
American Airlines Logo
4:53 pm - 12:07 am
HRL
-
SEA
9h 14m
1 stop
$359American Airlines
Wed, Nov 11 - Sun, Nov 15
Southwest Logo
9:20 am - 8:35 pm
SEA
-
HRL
9h 15m
1 stop
Southwest Logo
4:45 pm - 12:55 am
HRL
-
SEA
10h 10m
2 stops
$359Southwest
Wed, Nov 11 - Sun, Nov 15
Southwest Logo
9:20 am - 8:35 pm
SEA
-
HRL
9h 15m
1 stop
Southwest Logo
10:45 am - 7:15 pm
HRL
-
SEA
10h 30m
1 stop
$359Southwest
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.

What is the cheapest month to fly from Seattle to Harlingen?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Harlingen, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Harlingen is July, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,113 and $696 respectively.

Good to know

Low season

May

Cheapest flight

$208
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly and prices are also 22% 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 5 days, the lowest price for a flight from Seattle to Harlingen was $208 for a one-way ticket and $317 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?

    oneworld is the only airline alliance operating flights between Seattle and Harlingen.

  • 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 airline 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.
7.1
American AirlinesOverall score based on 11839 reviews
7.9Crew
6.4Food
7.5Boarding
7.2Comfort
6.8Entertainment
Airline reviews

Flight attendants and crew were great! This plane was fine. It was clean and everything worked properly. Now, the gate change was not communicated. No text or information. It wasn't far with the gate change but it still changed without any communication. Not sure if this is on American or Kayakl. Also, internet was the worst. I would never have ATT. 3+hr flight and weak internet. I think I watched the commercials to get on at least 6 times. Terrible internet!

6.0 GoodAmy, Jul 2026
SEA - DFW
Read more American Airlines reviews

Flight attendants and crew were great! This plane was fine. It was clean and everything worked properly. Now, the gate change was not communicated. No text or information. It wasn't far with the gate change but it still changed without any communication. Not sure if this is on American or Kayakl. Also, internet was the worst. I would never have ATT. 3+hr flight and weak internet. I think I watched the commercials to get on at least 6 times. Terrible internet!

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

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

Experience was fine. Seats were cramped, and we had to wait for repairs before we could take of. Even though the door remained open, we were warned that leaving the plane could cause difficulty trying to fly out later. Staff was pleasant, and climate control was fortunately working. We had trouble at the DFW terminal, but I don't think that was AA's fault.

Boarding, Seating, Flight Attendants, flight was okay. My seat was uncomfortable.

I had the exit seat with all the leg room I could ask for. Great!

I wish there were no credit card announcements. I paid hundreds of dollars, I don't need to pay again by sitting through advertisements.

The flight got delayed more than an hour due to maintenance issue after the passengers were all on board. I missed my connecting flight and had a trouble finding a next flight. The crews didn’t seem to care about the inconvenience of the passengers missing a next flight. It was very frustrating experience flying with American Airlines. I will not fly with AA in the future.

This flight was cancelled and I was passed around and given four different flight plans that got me in PV a full day late. I had to rebook a different flight with Delta and that was amazing

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

Information on your arrival and departure airports