$165 Find Cheap Flights from St. Louis to Harlingen - Compare and Save

In the last 5 days, the lowest price for a flight from St. Louis to Harlingen was $165 for a one-way ticket and $305 for a round-trip.

Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

St. Louis and Harlingen are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Harlingen Valley Intl.

We unfortunately don’t have that data for this specific route.

oneworld is the only airline alliance operating flights between St. Louis and Harlingen.

The two airlines most popular with KAYAK users for flights from St. Louis to Harlingen are Southwest and American Airlines. With an average price for the route of $417 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $390 and an overall rating of 7.1.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Harlingen.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and HRL can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.