Southwest AirlinesDepart15:50
Sat, Nov 14HRL → SAN
4h 35m · 1 stop
$252one way, per person
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- Cheapest fare
- $252
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 4h 35m
Southwest Airlines · Sat, Nov 14
from $252
Usually 1+ stop
2,020 km
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Cheapest month to fly from Harlingen to San Diego
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
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About flights from Harlingen to San Diego
Harlingen (HRL) and San Diego (SAN) are about 2,020 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 4h 35m. Over the next few months, one-way fares start from $252, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Harlingen to San Diego?
The cheapest one-way fare we've seen recently is $252 with Southwest Airlines, departing Saturday, November 14, 2026.
What is the cheapest month to fly from Harlingen to San Diego?
November 2026 currently has the lowest fares, from $252 one way.
Are there direct flights from Harlingen to San Diego?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Harlingen to San Diego?
The quickest journey we've seen takes about 4h 35m. Harlingen and San Diego are around 2,020 km apart.
Which airlines fly from Harlingen to San Diego?
Recent fares on this route were with Southwest Airlines.
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