Cheap flights from Harlingen to Seattle

Compare Harlingen to Seattle flight deals

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Flight deals from Harlingen to Seattle

Looking for a cheap last-minute deal or the best round-trip flight from Harlingen Airport to Seattle? If you want to travel next month, round-trip fares start from $332. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Harlingen to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Harlingen to Seattle flights are currently cheapest in September.

Harlingen to Seattle: Flight information

The things to know before you go.
Cheapest flight found$307
Cheapest month to flySeptember

Finding cheap flights from Harlingen to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a round-trip flight from Harlingen to Seattle is $307. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Harlingen to Seattle. But we found flights with one or more stops from $307.
There are no flights flying from Harlingen to Seattle, as of July 2026.
The cheapest month to fly from Harlingen to Seattle is usually September.
If you're flying from Harlingen Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the center of Seattle. We've found flights to this airport from $307.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Harlingen Airport to Seattle on Wednesday, September 16, 2026.
No airlines currently offer direct flights between Harlingen Airport and Seattle. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

In July, the average temperature is usually around 17°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, United offers the cheapest flight tickets to Seattle.

Flying from Harlingen Valley International Airport (HRL) to Seattle: what you need to know

  • Harlingen Valley International Airport is located in Harlingen. Based in the UTC-8 timezone, Seattle is two hours behind Harlingen.

  • To avoid missing your HRL to Seattle flight, allow plenty of time for things like baggage drop and finding your gate. Arriving two hours before international departures and an hour before domestic flights is the standard rule.

  • During popular months like April, you'll want to get to the airport earlier than usual. Plan to arrive two hours before a domestic departure and four hours ahead of international flights when you travel during a peak period in general.

  • Located around 5 kilometers from the center of Harlingen, HRL can be reached in about 10 minutes by car (depending on traffic). The journey on public transport takes roughly 30 minutes.

  • Want a relaxed start to your journey? Stay near HRL. Whether you've booked an early flight from Harlingen Valley International Airport to Seattle or just don't want to be rushed, these hotels are worth a look:

  • Harlingen Valley International Airport scores high marks for on-time performance. 81% of flights that depart HRL reach their destination without delay.

  • You'll find HRL at 3002 Heritage Way.

How to find the cheapest flights from Harlingen Valley International Airport (HRL) to Seattle

  • $173 is currently the lowest price for a one-way Harlingen Valley International Airport to Seattle flight. Return plane tickets start from $307. These fares may change based on demand and availability.

  • To pick up cheap flights from HRL to Seattle, book as early as you can. Airlines typically offer lower fares when tickets are first released.

  • If you can be flexible with your travel plans, try using the 'Whole month' search tool. It'll give you the lowest price across every month when searching for a Harlingen Valley International Airport to Seattle ticket.

  • There's no need to keep looking every day to see if fares have dropped when you set up a Price Alert. We'll notify you as soon as there's an extra saving on cheap flights from HRL to Seattle.

  • Tailor your trip with filters. Pick your ideal departure and arrival times, airlines and total journey duration. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from Harlingen Valley International Airport to Seattle.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) is around 23 kilometers from the center of Seattle. If you're getting a cab or a ride-share, the drive takes about 25 minutes.

  • If you're using public transport, expect a journey time of around 35 minutes.

  • Think about booking a hotel near SEA if you're coming in on a late flight from Harlingen Valley International Airport to Seattle. Choose one of these accommodation options and make your first night all about catching up on rest:

  • Lock in the lowest price by booking your vehicle from Seattle-Tacoma International Airport around one week ahead of your flight from HRL to Seattle.

Seattle Paine Field International Airport (PAE)

  • The center of Seattle is located around 40 kilometers from Seattle Paine Field International Airport (PAE). After your flight from Harlingen Valley International Airport to Seattle has hit the runway and you've navigated your way to arrivals, expect a drive of about 40 minutes.

  • The journey will take roughly 1 hour 30 minutes on public transport.

  • After stepping off your HRL to Seattle flight, rest your head at a hotel near PAE. These are some great accommodation options that'll help you get into relaxation mode:

  • Avoid filling out forms at the rental desk by completing your booking beforehand. Secure your ride from PAE a few weeks in advance so you can just get the keys and go.

King County International Airport (BFI)

  • King County International Airport (BFI) is about 11 kilometers from central Seattle. It'll take you about 20 minutes to get to the city center in a ride-share or cab once you've hopped off your flight from Harlingen Valley International Airport to Seattle.

  • If you're using public transport, the journey will take you about 35 minutes.

  • If you don't want to make your way to the center, find a hotel close to BFI. Make yourself comfy at one of these stays after your HRL to Seattle flight:

  • If you're hoping for a particular make or model, booking early increases your chances of getting exactly what you want. Secure your ride from BFI at least a couple of weeks ahead of your flight from Harlingen Valley International Airport to Seattle.

Best time to go to Seattle

  • It's time to work out your travel dates for your flight from Harlingen Valley International Airport to Seattle. July is the busiest month to visit Seattle. If you prefer a quieter vibe, go in December.

  • When booking your Harlingen Valley International Airport to Seattle plane ticket, think about the type of weather you enjoy. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • Look for cheap tickets from HRL to Seattle in February if you like traveling in cooler conditions. Temperatures are at their lowest then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

More about Seattle

  • Once you've booked your flight from Harlingen Valley International Airport to Seattle, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Seattle:

  • There are so many things to see and do in this city it can be hard to know where to begin. Pike Place Market, Space Needle and Seattle Skyline are major attractions which should be on any well-planned Seattle itinerary.

Explore more of the United States

  • You've done Seattle, now it's time to discover more of the United States. Journey about 241 kilometers south to Portland to tick off its must-visit sights. From Portland Japanese Garden to Peninsula Park Rose Garden and Beyond Van Gogh Portland, there's plenty to keep you on the go.

  • If there's time to check out another major stop in the United States, consider Spokane, roughly 370 kilometers east of Seattle. Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.