Getting There and Between Stops
San José (SJO) has nonstop flights from many US gateways, including Atlanta, Houston, Dallas, Miami and New York. Domestic flights to Quepos (XQP) take about half an hour and save most of the three-hour drive. On the way home, Puerto Jiménez (PJM) has flights of about 50 minutes to San José.
Between the two stops, a private driver is the easiest choice. The paved coastal highway runs south past Dominical and Uvita, then the road curves around the Golfo Dulce to Puerto Jiménez. Allow about four hours plus a lunch stop. The last stretch to the lodges near Cabo Matapalo is unpaved.
Domestic planes have tight bag limits of around 30 pounds each, so pack soft duffels. You do not need a rental car on this route. Hotels and lodges arrange transfers and tours.
Where to Stay
In Manuel Antonio, Arenas del Mar is the pick if you want a real beach, since its 11-acre reserve runs down to Playitas Beach beside the park. Its one-bedroom suites have jacuzzis on the balcony. Gaia Hotel & Reserve accepts guests aged 13 and over, with around 20 rooms, a strong spa and a three-tiered infinity pool. Sí Como No is the best value, with a kid-free pool area and a Honeymoon room category.
On the Osa, Lapa Rios Lodge is the best known eco-lodge in the country, with open-air bungalows and villas on a private reserve. Book a Premier Villa or Lapa Villa for the full open-air feel, or an air-conditioned room if heat bothers either of you. Packages include meals and activities, which makes the nightly rate look higher than it is.
When to Go
December through April is the dry season on this coast. Skies are mostly clear, trails are firm and river crossings in Corcovado are lower. It is also the busiest time, so book the Osa lodge several months ahead and Manuel Antonio early for Christmas, New Year and Easter week.
May through November is the green season, with sunny mornings and heavy afternoon rain. July and early August often bring a short drier spell, plus whales off the Osa and lower rates, which makes that window a smart compromise.
September to November is the wettest period. Some Osa lodges close for part of it and some Corcovado trails can shut. If you travel in green season, plan outdoor time for the morning and save the spa or a long lunch for the afternoon showers.
Budget and Booking
As an approximate guide, Manuel Antonio's honeymoon hotels start at around $260 a night for two at Sí Como No, about $450 at Gaia and about $550 at Arenas del Mar, with higher rates in peak weeks. Lapa Rios starts at around $1,000 a night for two, but its packages include meals and activities and lodges here often bundle transfers too.
Add domestic flights, the private driver between stops, a naturalist guide and park tickets in Manuel Antonio, the sunset catamaran and the Corcovado day if it is not in your package.
Book the Osa lodge first, since rooms are few. Then buy Manuel Antonio park tickets online as soon as your dates are firm. Bring US dollars or colones in cash for tips, since outlying lodges and guides often prefer cash.
Staying Comfortable and Safe
The Pacific has rip currents outside the sheltered coves. Swim where others are swimming, stay out when red flags fly and ask locally on the Osa. Crocodiles live in river mouths and lagoons, so never swim there.
Inside Manuel Antonio park, capuchins and raccoons steal food. Keep bags zipped and never feed the animals. Ignore touts near the park entrance and use guides your hotel books.
Pack quick-dry clothes, a light rain jacket for each of you, sandals that can get wet, a headlamp for night walks and a dry bag for boat rides. Use insect repellent and reef-safe sunscreen. Mosquitoes on this coast can carry dengue. If you're pregnant or hoping to be soon, check CDC travel health notices for Costa Rica before you book. Wi-Fi on the Osa is often slow, which many couples welcome.
Make It Shorter or Longer
For six days, spend two nights in Manuel Antonio and three on the Osa. You keep the park walk and the Corcovado day but lose the catamaran and the slow day on the gulf. If you only have five days, choose one stop. Manuel Antonio is easier and has more restaurants, while the Osa is wilder.
For ten days, add a night in Manuel Antonio for the mangrove kayak at Isla Damas, then try a different corner of the Osa. Drake Bay on the northwest side is the base for snorkeling at Caño Island and boat trips to the Sirena station.
Couples who want hot springs and volcano views can add Arenal at the start, a long drive or short flight from Manuel Antonio, or follow the longer Arenal, Monteverde and Manuel Antonio route instead.