Cheap flights from San Francisco to Guanacaste
Cheapest current fares: $341 in May 2026, 4,744 km direct flight in ~5h 35m.
Cheapest month-by-month fares
Lowest available fare per calendar month from San Francisco (SFO) to Guanacaste (LIR). Refreshed daily.
San Francisco (SFO) → Guanacaste (LIR)
- May 2026 $341
- June 2026 $344
Frequently asked questions
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What is the cheapest month to fly from San Francisco to Guanacaste?
Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from San Francisco (SFO) to Guanacaste (LIR), with fares starting from $341.
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What is the lowest current fare from SFO to LIR?
The lowest currently-listed fare from San Francisco (SFO) to Guanacaste (LIR) is $341 on 2026-05-31.
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How long is the flight from San Francisco to Guanacaste?
Direct flights from SFO to LIR cover approximately 4,744 km (2,948 miles), with an estimated flight time of 5h 35m. Operating airlines: AS, UA.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.