What is the difference between the most popular and the most frequent airline at Harlingen?

Delta operates the most flights from Canada to Harlingen at 0 per week, while United Airlines is the airline most often selected by KAYAK users searching for flights from Canada to Harlingen. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

Which city has the cheapest flights to Harlingen?

Based on fares booked in the past 5 days, the cheapest flights to Harlingen are from Toronto, starting at C$ 665 round-trip, and from Montreal, starting at C$ 723 round-trip.

How do I know if a flight to Harlingen is a good deal?

A good deal on a flight to Harlingen is around C$ 733 round-trip. This fare is in the lowest 25% of round-trip prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

What is the cheapest flight to Harlingen?

Toronto Pearson Intl Airport to Harlingen is the cheapest route at C$ 665 round-trip, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

How much is a flight to Harlingen?

On average, a round-trip flight from Canada to Harlingen costs C$ 892, based on KAYAK data over the past 12 months. Round-trip fares from Toronto average C$ 869, while Montreal runs a bit higher at C$ 888.

What is the cheapest time of day to fly to Harlingen?

Morning flights to Harlingen are the cheapest at C$ 874 round-trip on average. Evening flights are the most expensive at C$ 1,109.

What is a good deal for flights to Harlingen?

Flights under C$ 733 are considered a good deal. 25% of KAYAK users found round-trip flights to Harlingen at or below these prices, with the lowest fares from: •Montreal C$ 578.

What are the most popular airlines flying to Harlingen?

United Airlines is the most popular airline flying to Harlingen among KAYAK users, followed by Delta and Air Canada.

C$ 352 CHEAP FLIGHTS to Harlingen in 2026/27

Save 25% 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.

Cheapest round-trip

C$ 665

Typical prices: C$ 733-C$ 1,170

American Airlines

Thu 22/2Sun 4/3

YYZ - HRL • 1 stop

Cheapest one-way flights

C$ 352

Typical prices: C$ 381-C$ 591

United Airlines

Sat 8/12

YUL - HRL • 2 stops

Top airlines

Delta

Best reviews • 7.8 score

Airline reviews

Top routes

YTO - HRL

Cheapest • 5% average savings

YWG - HRL

Most popular

Insights

When to travel

February

Cheapest • 30% price drop

January

Most popular

Good to know

Start a new search

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We hope you enjoy your trip to Harlingen!

Flight Deals

Cheap Flights to Harlingen

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

All Flight Deals

Recent round-trip flight deals to Harlingen

Mon, 22 Feb - Thu, 4 Mar

5:00 p.m. - 10:52 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

6h 52m1 stop Dallas/Fort Worth

5:56 a.m. - 1:11 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

6h 15m1 stop Dallas/Fort Worth

C$ 665American Airlines

3+ days ago

Mon, 22 Feb - Thu, 4 Mar

1:45 p.m. - 10:52 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

10h 07m2 stops New York LaGuardia Dallas/Fort Worth

5:56 a.m. - 1:11 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

6h 15m1 stop Dallas/Fort Worth

C$ 672American Airlines

3+ days ago

Mon, 22 Feb - Thu, 4 Mar

1:45 p.m. - 10:52 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

10h 07m2 stops New York LaGuardia Dallas/Fort Worth

5:56 a.m. - 3:45 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

8h 49m2 stops Dallas/Fort Worth New York LaGuardia

C$ 672American Airlines

3+ days ago

Sat, 14 Nov - Wed, 18 Nov

3:45 p.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

8h 03m1 stop Houston George Bush Intcntl

5:05 a.m. - 4:47 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

10h 42m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

C$ 679United Airlines

3+ days ago

Sat, 14 Nov - Wed, 18 Nov

8:35 a.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

15h 13m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

5:05 a.m. - 9:15 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

15h 10m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

C$ 679United Airlines

3+ days ago

Fri, 20 Nov - Fri, 27 Nov

6:10 a.m. - 7:47 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

14h 37m1 stop Houston George Bush Intcntl

7:10 a.m. - 2:17 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

6h 07m1 stop Houston George Bush Intcntl

C$ 691United Airlines

3+ days ago

Sat, 14 Nov - Wed, 18 Nov

3:45 p.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

8h 03m1 stop Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 693United Airlines

1 day ago

Sat, 14 Nov - Wed, 18 Nov

6:45 a.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

17h 03m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 693United Airlines

1 day ago

Sat, 14 Nov - Wed, 18 Nov

3:45 p.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

8h 03m1 stop Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 700United Airlines

2 days ago

Sat, 14 Nov - Wed, 18 Nov

6:45 a.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

17h 03m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 700United Airlines

2 days ago

All round-trip flight deals to Harlingen

Mon, 22 Feb - Thu, 4 Mar

5:00 p.m. - 10:52 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

6h 52m1 stop Dallas/Fort Worth

5:56 a.m. - 1:11 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

6h 15m1 stop Dallas/Fort Worth

C$ 665American Airlines

3+ days ago

Mon, 22 Feb - Thu, 4 Mar

1:45 p.m. - 10:52 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

10h 07m2 stops New York LaGuardia Dallas/Fort Worth

5:56 a.m. - 1:11 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

6h 15m1 stop Dallas/Fort Worth

C$ 672American Airlines

3+ days ago

Mon, 22 Feb - Thu, 4 Mar

1:45 p.m. - 10:52 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

10h 07m2 stops New York LaGuardia Dallas/Fort Worth

5:56 a.m. - 3:45 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

8h 49m2 stops Dallas/Fort Worth New York LaGuardia

C$ 672American Airlines

3+ days ago

Sat, 14 Nov - Wed, 18 Nov

3:45 p.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

8h 03m1 stop Houston George Bush Intcntl

5:05 a.m. - 4:47 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

10h 42m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

C$ 679United Airlines

3+ days ago

Sat, 14 Nov - Wed, 18 Nov

8:35 a.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

15h 13m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

5:05 a.m. - 9:15 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

15h 10m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

C$ 679United Airlines

3+ days ago

Fri, 20 Nov - Fri, 27 Nov

6:10 a.m. - 7:47 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

14h 37m1 stop Houston George Bush Intcntl

7:10 a.m. - 2:17 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

6h 07m1 stop Houston George Bush Intcntl

C$ 691United Airlines

3+ days ago

Sat, 14 Nov - Wed, 18 Nov

3:45 p.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

8h 03m1 stop Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 693United Airlines

1 day ago

Sat, 14 Nov - Wed, 18 Nov

6:45 a.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

17h 03m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 693United Airlines

1 day ago

Sat, 14 Nov - Wed, 18 Nov

3:45 p.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

8h 03m1 stop Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 700United Airlines

2 days ago

Sat, 14 Nov - Wed, 18 Nov

6:45 a.m. - 10:48 p.m.Toronto Toronto Pearson Intl-Harlingen Harlingen Valley Intl

17h 03m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

5:05 a.m. - 5:49 p.m.Harlingen Harlingen Valley Intl-Toronto Toronto Pearson Intl

11h 44m2 stops Houston George Bush Intcntl Newark

C$ 700United Airlines

2 days ago

Booking Insights

Price, demand, and travel trends for flights to Harlingen

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

What is the cheapest flight to Harlingen?: Toronto Pearson Intl Airport to Harlingen is the cheapest route at C$ 665 round-trip, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.
How much is a flight to Harlingen? Average and cheapest price for all round-trip flights to Harlingen from each origin found by users searching on KAYAK in the last 12 months.: On average, a round-trip flight from Canada to Harlingen costs C$ 892, based on KAYAK data over the past 12 months. Round-trip fares from Toronto average C$ 869, while Montreal runs a bit higher at C$ 888.
What is the cheapest time of day to fly to Harlingen? Average price for all round-trip flights depending on time of departure, seen by users on KAYAK in the last 12 months.: Morning flights to Harlingen are the cheapest at C$ 874 round-trip on average. Evening flights are the most expensive at C$ 1,109.
What is a good deal for flights to Harlingen?: Flights under C$ 733 are considered a good deal. 25% of KAYAK users found round-trip flights to Harlingen at or below these prices, with the lowest fares from:
•Montreal C$ 578.

Find deals

Low season	June
High season	January
Cheapest flight	C$ 352

Beat the crowds with an average 92% drop in traveller numbers.

The most popular month to fly with an average 35% increase in traveller numbers.

One-way flight from Montreal Pierre Elliott Trudeau Intl Airport to Harlingen

When to book flights to Harlingen

Are your dates flexible? Find out the best times to travel 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. The information is for flights to Harlingen based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

How do I know if a flight to Harlingen is a good deal?
A good deal on a flight to Harlingen is around C$ 733 round-trip. This fare is in the lowest 25% of round-trip prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.
Which city has the cheapest flights to Harlingen?
Based on fares booked in the past 5 days, the cheapest flights to Harlingen are from Toronto, starting at C$ 665 round-trip, and from Montreal, starting at C$ 723 round-trip.
What is the difference between the most popular and the most frequent airline at Harlingen?
Delta operates the most flights from Canada to Harlingen at 0 per week, while United Airlines is the airline most often selected by KAYAK users searching for flights from Canada to Harlingen. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

For flights to Harlingen, a good round-trip fare is around C$ 733. If you find a fare below that, you're getting a strong deal.
If your travel dates are flexible, consider flying to Harlingen in February. Round-trip fares historically average C$ 624, making February the cheapest month to travel based on KAYAK data from the last 12 months.
Before you book:

• Check the route's typical price range so you can spot a deal.
• Confirm baggage fees and seat selection costs on budget carriers.
• Verify whether you need any travel documents beyond an ID.
• Pick a departure airport, since your nearest may not be the cheapest origin.
Shift your departure to morning to save up to C$ 235 per round-trip. Morning flights to Harlingen average C$ 874 compared to C$ 1,109 for afternoon flights.