Timing Comes First
The seasons are close to opposite, which often settles the question.
Bali's dry season runs roughly April to October, with Sumba dry from about May to November. July, August and the Christmas holidays are busiest on Bali, with May, June and September the sweet spots. The wet season, from about November to March, brings heavy but often short showers. Nyepi, Bali's Day of Silence in March or April, closes the whole island for 24 hours, airport included. Raja Ampat is the exception, with its calmest seas from about October to April.
Thailand is best from November to February for a two-region trip: dry on the Andaman coast around Phuket and Krabi and cool in the north. The Andaman monsoon runs from about May to October. Koh Samui, on the Gulf, is often pleasant in summer and wettest from about October to December.
A June wedding points to Bali. A December wedding points to Phuket and the north.
Culture and Atmosphere
Both are deeply welcoming, with strong spiritual traditions that shape daily life.
Bali's Hindu culture is distinct from the rest of predominantly Muslim Indonesia. Offerings of flowers and incense appear on doorsteps every morning, gamelan drifts from temples and ceremonies are frequent. Ubud has galleries, dance performances and water blessings at temples such as Tirta Empul. On Sumba, traditional villages and megalithic tombs reflect ancestral beliefs. On Lombok and the Gilis, cover up away from the beach.
Thailand is shaped by Buddhism and a deep respect for the monarchy, which Thai law protects. Temples fill the cities and the north, monks walk at dawn and the wai greeting is returned with warmth. Never point your feet at Buddha images or people.
In both countries, cover shoulders and knees at temples and keep public affection modest outside resorts. Bali's temples often lend a sarong and sash at the gate.
Resorts and Places to Stay
Both have world-class pool villas at good prices.
In Indonesia, Ubud's Ayung River valley holds Four Seasons Resort Bali at Sayan, Mandapa, a Ritz-Carlton Reserve and Bill Bensley's Capella Ubud tents. Uluwatu's cliffs have Bulgari Resort Bali and Alila Villas Uluwatu. Seminyak has The Oberoi Beach Resort and countless private villas. Beyond Bali, Nihi Sumba is one of Asia's most talked-about resorts, BASK Gili Meno offers villas on a car-free island, AYANA Komodo Waecicu Beach sits near Labuan Bajo and Misool Resort is a diving retreat in Raja Ampat.
In Thailand, Phuket has Trisara's sunset pool villas and Keemala's tree house villas. Rayavadee sits between three beaches on Krabi's Railay peninsula. Six Senses Samui crowns a Gulf headland, while Six Senses Yao Noi looks over Phang Nga Bay. Pimalai on Koh Lanta and 137 Pillars House in Chiang Mai add range. Four Seasons Tented Camp Golden Triangle has just 15 all-inclusive tents.
Getting There and Getting Around
Neither has nonstop flights from the US. Expect 20 hours or more in both cases.
For Indonesia, flights connect through Singapore, Tokyo, Seoul, Taipei or Hong Kong to Bali's Ngurah Rai International Airport (DPS). Getting around Bali means driving through slow traffic, so base yourselves in two areas rather than making long day trips. Ubud is about 1 to 1.5 hours from the airport and Uluwatu about 30 to 45 minutes. Sumba is an hour's flight east, while fast boats reach the Gilis in about two hours.
For Thailand, couples connect through Asia or the Middle East to Bangkok (BKK) or straight to Phuket (HKT). Domestic flights of about one to one and a half hours link Bangkok with Chiang Rai, Phuket, Krabi and Koh Samui. Between Phuket and Krabi, a boat across Phang Nga Bay takes about two hours.
Thailand is easier for multi-region trips. Bali rewards staying put longer.
Budget and Value
Both are excellent value. All figures are approximate and change with season.
In Indonesia, luxury resorts on Bali range from several hundred to well over a thousand dollars a night, with the most exclusive villas costing more. Boutique villas in Ubud and Seminyak can cost $150 to $400. Nihi Sumba sits at the high end, though rates there usually include meals. Local warung meals, full-day drivers and spa treatments are inexpensive.
In Thailand, upscale pool-villa resorts run roughly $300 to $700 a night in high season. Top-tier resorts are roughly $700 to $1,500, with exclusive villas and jungle camps often above that. Rates can fall by a third or more in green season. Street food, massages and ride-hailing are very cheap. Round-trip economy airfare from the US typically runs $900 to $1,800 per person.
In both, imported wine is heavily taxed, so that is where restaurant bills climb.
Food
Thailand has the edge for food lovers, though Bali is far from a compromise.
Thai food is a reason to travel in itself. Street-food meals cost a few dollars, night markets are lit with lanterns and the Michelin Guide covers Bangkok, Phuket and beyond. Phuket has its own cuisine, shaped by Chinese, Malay and Thai traditions, from moo hong pork belly to Hokkien noodles. A cooking class makes a fun shared memory.
Bali's food is rich and spiced. Try babi guling (spit-roasted pork) and bebek betutu (duck slow-cooked in spice paste). Nasi campur, rice with several small dishes, is a perfect introduction. Ubud has healthy cafes and tasting menus, while Seminyak is Bali's dining capital. Lombok's ayam taliwang is fiery.
In both countries, drink bottled or filtered water. In Indonesia, avoid homemade arak, which has caused methanol poisoning.
Practical Comfort and Safety
Both are generally welcoming for American couples. The risks are practical.
In Indonesia, strong currents affect many beaches, so swim between the flags. Roads are busy, so think twice before renting a scooter. Bali's temple monkeys grab sunglasses and phones. Drug penalties are severe. Dengue is present, so use repellent at dawn and dusk.
In Thailand, respect beach warning flags during the Andaman monsoon. Use reputable transport. Late at night, book Grab or a hotel car rather than an unmarked taxi. Avoid scooters unless you are experienced. Dengue is present here too.
If you're pregnant or hoping to be soon, check CDC travel health notices for both countries. Review the State Department advisories before you book. Travel insurance is wise for either, especially with domestic flights or boat transfers in the plan.

