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Find cheap United Airlines flights to San José

RDU — SJO
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Find United Airlines flight deals to San José

Cheapest United Airlines flights from USA to San José
Explore the most affordable United Airlines flight options available from USA to San José. Find the lowest fares with prices last updated on July 27, 2026.

This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2712:50 pm
IAD
-
SJO
1 stop8h 47m
United Airlines
Mon 8/312:44 pm
SJO
-
IAD
1 stop8h 35m
United Airlines
Deal found 7/23$398
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:30 am
IAD
-
SJO
1 stop7h 51m
United Airlines
Mon 8/312:44 pm
SJO
-
IAD
1 stop8h 35m
United Airlines
Deal found 7/24$407
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:50 pm
IAD
-
SJO
1 stop8h 47m
United Airlines
Fri 7/3111:13 am
SJO
-
IAD
1 stop9h 30m
United Airlines
Deal found 7/26$408

Flights to San José with United Airlines at a glance

Find detailed information about United Airlines flights from USA to San José. Explore the options provided by United Airlines to plan your journey from USA to San José. Data last updated July 27, 2026.

Popular in

July

Cheapest in

October

Average price

$571

Round-trip from

$373

One-way from

$159

Good one-way deal

$278 or less
Highest demand for flights to San José with United Airlines; 14% potential price increase.
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Best time to find cheap flights to San José with United Airlines; 2% potential price drop.
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Average price for flights to San José with United Airlines (round-trip).
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United Airlines
  • United Airlines
  • 11/14-11/21
  • 2 total stops
  • 18h 17m total
  • USA to San José
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United Airlines
  • United Airlines
  • 8/24
  • 1 total stop
  • 14h 37m total
  • USA to San José
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Price to beat on a one-way flight from the United States to San José with United Airlines.
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Cheapflights Insights

Find cheap United Airlines flights to San José

How long is the flight to San José with United Airlines?

On average, United Airlines flights from the United States to San José take 4 hours 8 minutes. Flights to San José from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.

United Airlines weekly flight availability to San José

The most flights to San José operated by United Airlines are scheduled on a Saturday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

When is the best time to book a flight to San José with United Airlines?

The best time to book a flight to San José with United Airlines is 30 days before departure. On average, fares are higher if you book 68 days before departure.

When is the cheapest time to fly to San José with United Airlines?

Users looking for the cheapest United Airlines fares to San José should consider flying on Tuesday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Saturday evenings, when prices are usually at their highest.

FAQs about flights to San José with United Airlines

  • Which airport do United Airlines flights arrive at when travelling to San José?

    United Airlines flights on this route tend to land at San José Juan Santamaria Intl Airport.

  • Is United Airlines the cheapest airline for a flight to San José?

    Flight prices will depend on many factors like date, time and cabin class so it is worth comparing flights before booking. Based on Cheapflights data the cheapest average return price for flights to San José tends to be with Allegiant Air.

  • Are there alternative airlines other than United Airlines that fly to San José?

    American Airlines, JetBlue and Avianca all fly to San José and offer an alternative to United Airlines.

  • How much is a flight to San José with United Airlines?

    The average price for a return flight with United Airlines is $633; with a one-way flight around $285.

See more FAQs

Reviews of United Airlines

See what Cheapflights users have to say about their United Airlines experience.
United Airlines
7.4
Good
10,000 reviews
Overview

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Popular United Airlines flights

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