$98 Cheap Flights from Harlingen (HRL) to Seattle (SEA)

View $98 flight on Sat, Dec 6, 2025Opens in a new window

Popular airlines from Valley Intl. Airport (HRL) to Seattle-Tacoma International Airport (SEA)

Cheap Flights from Harlingen to Seattle (HRL-SEA)

Prices were available within the past 7 days and start at $98 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Feb 4 - Wed, Mar 4
HRL
Harlingen
SEA
Seattle
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Feb 4 from Harlingen to Seattle, returning Wed, Mar 4, priced at $197 found 1 day ago
American Airlines
Thu, Jan 15 - Fri, Jan 23
HRL
Harlingen
SEA
Seattle
$216 Roundtrip, found 11 hours ago
$216
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Thu, Jan 15 from Harlingen to Seattle, returning Fri, Jan 23, priced at $216 found 11 hours ago
United
Sat, Dec 6 - Thu, Dec 11
HRL
Harlingen
SEA
Seattle
$221 Roundtrip, found 4 days ago
$221
Roundtrip
found 4 days ago
Select United flight, departing Sat, Dec 6 from Harlingen to Seattle, returning Thu, Dec 11, priced at $221 found 4 days ago
United
Sat, Dec 6 - Thu, Dec 11
HRL
Harlingen
SEA
Seattle
$226 Roundtrip, found 4 days ago
$226
Roundtrip
found 4 days ago
Select United flight, departing Sat, Dec 6 from Harlingen to Seattle, returning Thu, Dec 11, priced at $226 found 4 days ago
United
Mon, Jan 12 - Mon, Jan 19
HRL
Harlingen
SEA
Seattle
$228 Roundtrip, found 4 days ago
$228
Roundtrip
found 4 days ago
Select United flight, departing Mon, Jan 12 from Harlingen to Seattle, returning Mon, Jan 19, priced at $228 found 4 days ago
United
Mon, Jan 12 - Mon, Jan 19
HRL
Harlingen
SEA
Seattle
$233 Roundtrip, found 4 days ago
$233
Roundtrip
found 4 days ago
Select United flight, departing Mon, Jan 12 from Harlingen to Seattle, returning Mon, Jan 19, priced at $233 found 4 days ago
American Airlines
Wed, Feb 4 - Wed, Mar 4
HRL
Harlingen
SEA
Seattle
$237 Roundtrip, found 1 day ago
$237
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Feb 4 from Harlingen to Seattle, returning Wed, Mar 4, priced at $237 found 1 day ago
Southwest Airlines
Wed, Feb 4 - Wed, Mar 4
HRL
Harlingen
SEA
Seattle
$242 Roundtrip, found 1 day ago
$242
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Wed, Feb 4 from Harlingen to Seattle, returning Wed, Mar 4, priced at $242 found 1 day ago
Delta
Thu, Nov 20 - Sat, Dec 6
HRL
Harlingen
SEA
Seattle
$278 Roundtrip, found 3 days ago
$278
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Nov 20 from Harlingen to Seattle, returning Sat, Dec 6, priced at $278 found 3 days ago
Sun Country Airlines
Sat, Dec 20 - Sat, Jan 3
HRL
Harlingen
SEA
Seattle
$368 Roundtrip, found 5 days ago
$368
Roundtrip
found 5 days ago
Select Sun Country Airlines flight, departing Sat, Dec 20 from Harlingen to Seattle, returning Sat, Jan 3, priced at $368 found 5 days ago

Find the cheapest month to fly from Harlingen (HRL) to Seattle (SEA)

September is typically the cheapest month to fly

From $175 - $440 per traveler.

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $449
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $449

Frequently asked questions

How much does a flight from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA) cost?
Secure a cheap one-way flight from $98 or cheap return flight from $197 from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA)?
February is the cheapest month to fly from HRL to SEA. Planning your trip for the off-season is often the key to landing a great deal.
What is the cheapest airline that flies from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from HRL to SEA. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA)?
You'll need to take a flight with a layover when traveling from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from HRL to SEA?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a range of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA) route, travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until right before your break to book a flight from HRL to SEA often results in higher prices. Although you may find some last-minute deals, they're not always guaranteed. Keep your travel schedule open to boost your chances of snagging a bargain.
Is it cheaper to book a HRL to SEA flight and hotel package?
You can save money by securing a HRL to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After selecting your ideal accommodations and flights, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Valley Intl. Airport (HRL) to Seattle - Tacoma Intl. Airport (SEA)?
If you booked your HRL to SEA flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

Travel information

Origin airport
Valley Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$196
Distance
1984 mi

Book with confidence

Harlingen to Seattle Flights

The cheapest times to fly from Harlingen to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Harlingen to Seattle are during the month of February. You can find some of the cheapest flights from Harlingen to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Harlingen to Seattle

Sunday is one of the best days to book for cheap flights from Harlingen to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Harlingen to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Harlingen to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $98 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Harlingen to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Harlingen to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Harlingen to Seattle Flights

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*Available to One Key members.