Bangkok to Phnom Penh Flights: How to Book the Cheapest Fares (2026)

The Bangkok-Phnom Penh route doesn't come up in conversation as often as Vietnam or Japan, but it's a short trip — under an hour and a half in the air — to a capital city packed with history and a mix of colonial-era and ancient Khmer architecture. Fares on this route get far less attention from fare-watchers than the popular routes, so you can sometimes still find a better deal than expected.

Does this route fly direct from Thailand

Direct flights from Bangkok to Phnom Penh are available from both Suvarnabhumi and Don Mueang, depending on the airline. No layover through a third country needed, which suits a short trip over a long weekend where minimizing travel time matters.

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Flight time and how often flights run

The direct Bangkok-Phnom Penh flight takes only about 1 hour 10 minutes to 1 hour 20 minutes — even shorter than flying to northern Vietnam. Morning and afternoon departures are both available across several full-service and budget carriers, which even makes a same-day business trip technically doable if you really need it.

The common mix-up: Phnom Penh is not Siem Reap

The most common mistake people make booking a Cambodia ticket is confusing Phnom Penh with Siem Reap, since both are major tourist cities in the same country. Phnom Penh is the capital in the south, centered on the Royal Palace, museums, and old markets. Siem Reap sits in the north and is the gateway to Angkor Wat. If seeing Angkor Wat is your main goal, double-check that you're booking into Siem Reap airport, not Phnom Penh — the two cities are several hours apart by road, nowhere near as close as many people assume.

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When fares tend to drop

Fares on this route are usually lower midweek and outside major Cambodian holidays like Khmer New Year in April, when the entire country travels home at once. The rainy season from roughly June through September also tends to bring cheaper fares than the late-year peak season — the trade-off being a higher chance of heavy rain on any given day.

How far ahead should you book

For this route, booking about 3-6 weeks ahead usually gets the best fares, since it doesn't see the same demand as more popular routes — cheap seats don't sell out as fast as flights to Tokyo or Seoul. That said, if you're traveling during a long Thai holiday weekend when a lot of people fly out at once, book earlier than that to be safe.

Getting into the city from Phnom Penh airport

Phnom Penh International Airport is less than 10 km from the city center. A taxi or transfer van into town takes about 20-30 minutes depending on traffic — closer than the airport-to-city distance in several other major cities in the region. Booking a transfer through your hotel ahead of time gets you a fixed price rather than negotiating with a driver at the airport.

Getting ready: visa and cash

Check Cambodia's current visa requirements again shortly before you travel, since conditions can change over time, and make sure your passport has enough validity left to meet the requirement. On currency, Cambodia runs mostly on US dollars alongside the local riel — most shops and hotels accept dollars directly, but it's worth carrying some riel for smaller shops that give change in the local currency.

Once you land in Phnom Penh, where to go first

Most visitors head first to the Royal Palace and the adjoining Silver Pagoda, open to visitors and showcasing architecture that blends traditional Khmer art beautifully. A short walk along the Tonle Sap riverfront brings you to the Riverside area, packed with the city's highest concentration of restaurants and cafes — a solid starting point before branching out to the rest of the city.

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