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Cheap flights to Costa Rica: when to book and fly

Costa Rica has two gateways for two kinds of trip, and a "green season" that trades a little rain for much cheaper fares. Pick the right airport and month, and paradise gets affordable.

By the Snagfly team
Updated 5 August 2026 · 5 min read
Cheap flights to Costa Rica

Key takeaways

  • Two gateways: San Jose (SJO) for the capital and central/Caribbean side; Liberia (LIR) for the Guanacaste beaches - they price differently.
  • Dry season (December-April) is peak and priciest; the green (rainy) season is cheaper.
  • Best value: the green season and shoulder months, mid-week - afternoon showers, but real savings.
  • Pin Costa Rica and let Snagfly watch SJO (and LIR) across every airline for a genuine drop below the verified baseline.

Two airports for two trips

Costa Rica has two main gateways, and which is cheaper depends on where you're headed. San Jose (SJO), the capital, has the most flights and best connects the central valley, cloud forests and Caribbean coast. Liberia (LIR) in the northwest is the gateway to the Guanacaste beaches and can be cheaper (or pricier) depending on the season and your origin. Comparing both is worth it.

When to book and fly

  • Green season is cheapest. The rainy months (roughly May to November) bring lower fares, fewer crowds and lush landscapes - usually sunny mornings with afternoon showers.
  • Dry season (December-April) is peak - the most reliable weather, and the highest fares. The Christmas and Easter weeks are priciest of all.
  • Fly mid-week and give yourself lead time for dry-season and holiday travel.

How to judge a real Costa Rica deal

Because the two seasons and two airports create a lot of price variation, a fare that looks reasonable might just be normal dry-season pricing. Compare a fare against the typical price for your route into each airport and book when one clearly drops below - green-season sales are where the real value hides.

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Pin Costa Rica, let the fare drop find you

Add Costa Rica to your wishlist (pin both SJO and LIR) and Snagfly watches those routes across every airline, alerting only when a fare drops at least 50% below its verified 90-day median. You skip the dry-season peak and hear about the genuine green-season dips, then book directly with the airline.

FAQ

Should I fly into San Jose (SJO) or Liberia (LIR) for Costa Rica?
It depends on your trip. San Jose (SJO) has the most flights and suits the central valley, cloud forests and Caribbean coast. Liberia (LIR) is the gateway to the Guanacaste beaches in the northwest. They price differently by season and origin, so compare - or track - both.
When is the cheapest time to fly to Costa Rica?
The green (rainy) season - roughly May to November - is cheapest, with fewer crowds and lush scenery, usually sunny mornings and afternoon showers. The dry season (December to April) has the best weather and the highest fares, peaking at Christmas and Easter.
How far in advance should I book a Costa Rica flight?
Book earlier for the dry season and holiday weeks, when demand and fares are highest. In the green season there's more flexibility - tracking your route and booking on a clear dip is the reliable approach.
How do I know if a Costa Rica flight is a good deal?
Compare the fare against the normal price for your route into SJO or LIR, not against peak dry-season rates. Snagfly does this for you - pin Costa Rica and it only alerts when a fare drops at least 50% below the verified 90-day median.

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About Snagfly

Snagfly is a wishlist-based flight deal alert service. You pin the destinations you want to fly to, and we watch those exact routes 24/7 - alerting you only when a fare drops at least 50% below its verified 90-day median, capped at three emails a week. We take no commission; you book directly with the airline.

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About this guide: Snagfly publishes this page. Route, airport and seasonal details change frequently and are based on publicly available information as of August 2026; check live fares before booking. All third-party names and trademarks belong to their respective owners; this page is not affiliated with or endorsed by any of them.