Roundtrip Boise ID to San Jose Costa Rica Airfares on United Airlines

No special codes or coupons are required. Get these roundtrip airfares while they are available.

This deal expires on May 31, 2026.

Important Exclusions

• These are basic economy fares that only allow a personal item.
• No seat selection, no carry-on bag, and no changes are permitted.
• If traveling with children, you will be seated together as per United Airlines policy.

Travel Availability

• Departs BOI: January 6, 8, 10-13, 18, 20-29, 31; February 1-5, 8-10, 18, 24-25, 28; March 2-3, 9-10, 17-18, 30-31; April 1, 6, 8, 13-15, 17-18, 20-22, 24-26, 28-29; May 1-2, 5-9, 12-13, 19
• Returns: January 14, 21-23, 27-31; February 2-7, 9-11, 17, 19; March 4-5, 9-10, 17-18, 25; April 14, 21; May 5, 9, 12, 23-24, 27; June 2