Cheap flights from Seattle to Harlingen from $312
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Harlingen departing on 7/31. 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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American Airlines flights from Seattle to Harlingen, Texas
Our best American Airlines deals on Seattle to Harlingen, Texas flight tickets
Southwest flights from Seattle to Harlingen, Texas
Our best Southwest deals on Seattle to Harlingen, Texas flight tickets
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How to get the cheapest flight ticket from Seattle to Harlingen, Texas
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, Texas?
The month of March is, on average, the cheapest month to fly to Harlingen, Texas from Seattle, with most prices found around $307. If you are unable to visit Harlingen, Texas during the month of March, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $316.
What is the cheapest day to depart on your flight to Harlingen, Texas?
The cheapest day to depart on your flight to Harlingen, Texas is on a Thursday when prices can be found for as low as $402. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Harlingen, Texas for around $873.
When to book flights from Seattle to Harlingen, Texas
Cheap Seattle to Harlingen, Texas (SEA to HRL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Harlingen, Texas
Best Price Found | $312 |
|---|---|
Fastest flight time | 6h 13m |
Direct flights | None |
Airports in Harlingen, Texas | 1 airport |
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 13m.
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 are 3 operators available for flights from Seattle/Tacoma Intl Airport to Harlingen Valley Intl Airport as of July 2025.
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, Texas?
momondo data reveals that the most frequently booked airline on the route from Seattle to Harlingen, Texas is American Airlines, representing 70% of all bookings. The subsequent popular airlines are United Airlines at 15% and Southwest at 15%.
Best airlines flying from Seattle to Harlingen, Texas
Compare and see reviews for airlines that fly from Seattle to Harlingen, Texas with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $225 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $327 | Free Cancellation | Rating 8.0 4,270 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.