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Boise → San Jose

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BOI → SJO1 adulteconomy

6 flight options · 1 airline

Round-trip flights

Fri, Nov 27 – Fri, Dec 4

United Airlines
10:40 amBOI
10h 20m
DEN · 3h 1m
10:00 pmSJO
United Airlines
7:30 amSJO
11h 37m
DEN · 3h 33m
6:07 pmBOI

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

United Airlines
10:40 amBOI
10h 20m
DEN · 3h 1m
10:00 pmSJO
United Airlines
7:30 amSJO
11h 37m
DEN · 3h 33m
6:07 pmBOI

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

United Airlines
6:55 pmBOI
12h 37m
SFO · 3h 58m
8:32 am+1SJO
United Airlines
7:30 amSJO
11h 37m
DEN · 3h 33m
6:07 pmBOI

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

United Airlines
6:55 pmBOI
12h 37m
SFO · 3h 58m
8:32 am+1SJO
United Airlines
7:30 amSJO
11h 37m
DEN · 3h 33m
6:07 pmBOI

Round-trip total · 1 adult · Taxes included

One-way flights

Fri, Nov 20 · One way

United Airlines
6:55 pmBOI
12h 37m
SFO · 3h 58m
8:32 am+1SJO

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

United Airlines
10:40 amBOI
10h 20m
DEN · 3h 1m
10:00 pmSJO

One-way total · 1 adult · Taxes included

Make this trip yours

BOI ⇄ SJO

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, United Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • 24-hour cancellationCancel within 24 hours of booking for a full refund when your departure is at least 7 days away. Closer to departure, the airline’s fare rules apply. Cancellation policy
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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

Nov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-11-20 · one wayUnited AirlinesUA4753 + UA2312$345.002026-10-29T00:51:26Z
2026-11-27 → 2026-12-04United AirlinesUA5454 + UA536 / UA1087 + UA6045$726.002026-10-29T00:51:26Z
2026-11-20 → 2026-11-23United AirlinesUA5454 + UA536 / UA1087 + UA6045$726.002026-10-29T00:51:26Z
2026-11-20 · one wayUnited AirlinesUA5454 + UA536$345.002026-10-29T00:51:26Z
2026-11-20 → 2026-11-23United AirlinesUA4753 + UA2312 / UA1087 + UA6045$726.002026-10-29T00:51:26Z
2026-11-27 → 2026-12-04United AirlinesUA4753 + UA2312 / UA1087 + UA6045$726.002026-10-29T00:51:26Z

2026-11-20 · one way · $345.00

  • United Airlines UA4753 / UA2312: BOI 2026-11-20 18:55:00 → SJO 2026-11-21 08:32:00; 1 stop(s) via SFO; 757 minutes. Local airport times.
    • UA4753: BOI 2026-11-20 18:55:00 → SFO 2026-11-20 20:10:00; layover at SFO: 238 minutes.
    • UA2312: SFO 2026-11-21 00:08:00 → SJO 2026-11-21 08:32:00.

2026-11-27 → 2026-12-04 · $726.00

  • United Airlines UA5454 / UA536: BOI 2026-11-27 10:40:00 → SJO 2026-11-27 22:00:00; 1 stop(s) via DEN; 620 minutes. Local airport times.
    • UA5454: BOI 2026-11-27 10:40:00 → DEN 2026-11-27 12:45:00; layover at DEN: 181 minutes.
    • UA536: DEN 2026-11-27 15:46:00 → SJO 2026-11-27 22:00:00.
  • United Airlines UA1087 / UA6045: SJO 2026-12-04 07:30:00 → BOI 2026-12-04 18:07:00; 1 stop(s) via DEN; 697 minutes. Local airport times.
    • UA1087: SJO 2026-12-04 07:30:00 → DEN 2026-12-04 12:15:00; layover at DEN: 213 minutes.
    • UA6045: DEN 2026-12-04 15:48:00 → BOI 2026-12-04 18:07:00.

2026-11-20 → 2026-11-23 · $726.00

  • United Airlines UA5454 / UA536: BOI 2026-11-20 10:40:00 → SJO 2026-11-20 22:00:00; 1 stop(s) via DEN; 620 minutes. Local airport times.
    • UA5454: BOI 2026-11-20 10:40:00 → DEN 2026-11-20 12:45:00; layover at DEN: 181 minutes.
    • UA536: DEN 2026-11-20 15:46:00 → SJO 2026-11-20 22:00:00.
  • United Airlines UA1087 / UA6045: SJO 2026-11-23 07:30:00 → BOI 2026-11-23 18:07:00; 1 stop(s) via DEN; 697 minutes. Local airport times.
    • UA1087: SJO 2026-11-23 07:30:00 → DEN 2026-11-23 12:15:00; layover at DEN: 213 minutes.
    • UA6045: DEN 2026-11-23 15:48:00 → BOI 2026-11-23 18:07:00.

2026-11-20 · one way · $345.00

  • United Airlines UA5454 / UA536: BOI 2026-11-20 10:40:00 → SJO 2026-11-20 22:00:00; 1 stop(s) via DEN; 620 minutes. Local airport times.
    • UA5454: BOI 2026-11-20 10:40:00 → DEN 2026-11-20 12:45:00; layover at DEN: 181 minutes.
    • UA536: DEN 2026-11-20 15:46:00 → SJO 2026-11-20 22:00:00.

2026-11-20 → 2026-11-23 · $726.00

  • United Airlines UA4753 / UA2312: BOI 2026-11-20 18:55:00 → SJO 2026-11-21 08:32:00; 1 stop(s) via SFO; 757 minutes. Local airport times.
    • UA4753: BOI 2026-11-20 18:55:00 → SFO 2026-11-20 20:10:00; layover at SFO: 238 minutes.
    • UA2312: SFO 2026-11-21 00:08:00 → SJO 2026-11-21 08:32:00.
  • United Airlines UA1087 / UA6045: SJO 2026-11-23 07:30:00 → BOI 2026-11-23 18:07:00; 1 stop(s) via DEN; 697 minutes. Local airport times.
    • UA1087: SJO 2026-11-23 07:30:00 → DEN 2026-11-23 12:15:00; layover at DEN: 213 minutes.
    • UA6045: DEN 2026-11-23 15:48:00 → BOI 2026-11-23 18:07:00.

2026-11-27 → 2026-12-04 · $726.00

  • United Airlines UA4753 / UA2312: BOI 2026-11-27 18:55:00 → SJO 2026-11-28 08:32:00; 1 stop(s) via SFO; 757 minutes. Local airport times.
    • UA4753: BOI 2026-11-27 18:55:00 → SFO 2026-11-27 20:10:00; layover at SFO: 238 minutes.
    • UA2312: SFO 2026-11-28 00:08:00 → SJO 2026-11-28 08:32:00.
  • United Airlines UA1087 / UA6045: SJO 2026-12-04 07:30:00 → BOI 2026-12-04 18:07:00; 1 stop(s) via DEN; 697 minutes. Local airport times.
    • UA1087: SJO 2026-12-04 07:30:00 → DEN 2026-12-04 12:15:00; layover at DEN: 213 minutes.
    • UA6045: DEN 2026-12-04 15:48:00 → BOI 2026-12-04 18:07:00.

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