Phnom Penh to Siem Reap: bus, minivan, flight or boat?

Floating village on the Tonle Sap lake, on the boat route between Phnom Penh and Siem Reap — The Tonle Sap, which the slow boat crosses in high-water season — the scenic way between the two cities.

It's the most-traveled route in Cambodia — roughly 320 km between the capital and the gateway to Angkor — and you have four genuinely different ways to do it. Here's how they compare on time, price and comfort, and which one makes sense for your trip.

Last updated: October 19, 2026

Quick answer

For most travelers, the day bus is the sweet spot: around 6 hours and $15–18 with Giant Ibis, the best-regarded operator on the route. Minivans (from about $11) shave off a little time and money but ride tighter. The flight takes about an hour in the air but closer to 3.5–4 hours door to door once you count the long drives to both new airports — worth it if you're short on days, at roughly $50–100 one-way. And if you're traveling in high-water season, the slow boat across the Tonle Sap (around $49, 5.5–6.5 hours) is the trip you'll actually remember.

The options at a glance

Option	Typical time	Typical price	Best for
Day bus (e.g. Giant Ibis)	~6 hours	$15–18 (budget operators $9–14)	Best balance of price, comfort and safety
Minivan (e.g. VET Air Bus Express)	5.5–6 hours	$11–19	Frequent departures, getting there a bit sooner
Night sleeper bus	~6 hours, arrive 5–6am	$15–19	Saving a hotel night; tight itineraries
Flight (KTI → SAI)	~1 hour in the air; 3.5–4 hours door to door	$50–100 one-way	Short trips where a day matters
Slow boat (seasonal)	5.5–6.5 hours	~$49 (foreign visitor fare)	The journey itself; high-water season only
Private car / taxi	5–5.5 hours	~$65–100 per car	Groups, families, door-to-door ease

Prices are typical ranges reported by operators and booking platforms in October 2026. Fares drift with season, holidays and how far ahead you book — treat this as a fair-price compass, not a contract.

The bus: the default, and for good reason

Dozens of buses a day run National Road 6 between the two cities, and standards on the best of them are genuinely good: air-conditioning, assigned seats, a rest stop around Kampong Thom at the halfway mark, and drivers who swap midway on the top operators.

Giant Ibis is the name most travelers land on, and it earns it: a strong safety reputation, passenger insurance included, Wi-Fi and power outlets on board, and the option to pick your seat when you book online. Day buses typically leave Phnom Penh around 8:45am, 9:45am and 12:30pm, taking about 6 hours, at roughly $15–18.
VET Air Bus Express (the premium brand of Vireak Buntham) runs comfortable buses and minivans with very frequent departures — often hourly through the day — typically in the $15–19 range. Larryta and Cambolink21 are also widely used, and budget operators start from about $9–11 if price is everything.
Mekong Express, one of the oldest names on the route, still runs services typically listed around $13–15, though with fewer departures than the big two — check the current timetable before building plans around it.
Night sleeper buses leave around 10:30–11pm and roll into Siem Reap around 5–6am. They save a hotel night, and the big operators use two drivers — but rural highways are unlit, sleep is hit-and-miss, and you'll arrive before most hotels can check you in. A day bus plus countryside views is the calmer choice for most people.

One honest road note: Cambodian intercity driving is brisk, and this is exactly the kind of trip where your travel insurance earns its keep. Buy the policy for the medical cover; enjoy the bus ride for the scenery.

The flight: fast in the air, slower than it looks

Direct flights run several times a day between the two cities, operated mainly by Air Cambodia (the renamed Cambodia Angkor Air) and Cambodia Airways, and take only about 50–65 minutes in the air. One-way fares typically start around $50 and commonly land in the $50–100 range depending on timing and how early you book.

The catch is geography — both airports moved:

Phnom Penh end: flights use the new Techo International Airport (KTI), about 30 km south of the city center. Budget 45–75 minutes and roughly $15 (tuk-tuk) to $15–30 (car) to get there.
Siem Reap end: Siem Reap Angkor International (SAI) sits roughly 45–50 km east of town — about an hour's drive, $25–40 by car, or around $8 on the airport shuttle bus to a central stop.

Add check-in time and the flight's real door-to-door total is usually 3.5–4 hours. That's still the fastest option — just not the "one hour" it first looks like. Flying in or out also means the e-Arrival card applies to you on international arrivals, so sort that before you travel.

The boat: slow, seasonal, unforgettable

The classic route: down the Tonle Sap river and across the great lake to a port near Siem Reap, passing floating villages and flooded forest along the way. The service returned in 2025 after a pause of about six years, and reported fares are around $49 for foreign visitors (less for Cambodian nationals), with a bus transfer from the port into Siem Reap town included. Crossing time is typically 5.5–6.5 hours.

The big caveat is the calendar: the boat only runs in high-water season, roughly August to February. In the dry months the lake level drops and the service stops entirely — so if a boat trip is a must-do, plan your Cambodia dates around it, and confirm it's operating before you rely on it. It's an open-water ride in the sun, too: hat, sunscreen and a dry bag for your gear are not optional extras.

So which one should you pick?

Normal trip, normal budget: the Giant Ibis day bus. Comfortable, safe, cheap, done.
Every dollar counts: a budget minivan or bus from ~$9–11. Expect tighter seats and a more, let's say, enthusiastic driving style.
Only a few days in Cambodia: fly. The extra $40–80 buys back most of a day of temple time.
Traveling August–February and in no rush: take the boat one way and the bus back. Best of both.
Group of 3–4, or traveling with kids and luggage: a private car at ~$65–100 split between you is barely more than bus fares — with door-to-door pickup and stops when you want them.

Booking tips

Book a day or two ahead in high season (November–February) and around Cambodian holidays — the good departures sell out, and "sold out" at the terminal is a real thing.
Morning departures beat afternoon ones. Leaving Phnom Penh by mid-morning gets you into Siem Reap with daylight and dinner options intact.
Ask about hotel pickup. Several operators collect from central hotels, which saves a tuk-tuk fare and a terminal hunt.
Keep valuables in your daypack, not the luggage hold — good advice on every bus everywhere, Cambodia included.

Frequently asked questions

How long does it take to get from Phnom Penh to Siem Reap?

By road, typically 5.5 to 7 hours by bus or minivan for the roughly 320 km trip on National Road 6. The flight itself is about an hour, but with transfers to and from the two out-of-town airports, door to door usually runs 3.5 to 4 hours. In season, the boat takes around 5.5 to 6.5 hours.

What is the cheapest way from Phnom Penh to Siem Reap?

A standard bus or minivan. Budget operators start around $9–11, while the best-regarded bus company on the route, Giant Ibis, typically charges around $15–18. Prices rise a little in peak season and around Cambodian public holidays.

Is there a train from Phnom Penh to Siem Reap?

No. Cambodia's passenger railways run from Phnom Penh to Sihanoukville and to Poipet via Battambang — neither line serves Siem Reap. For this trip your options are bus, minivan, a domestic flight, a private car, or the seasonal boat.

Are night buses from Phnom Penh to Siem Reap a good idea?

They're widely used and the big operators run sleeper buses with two drivers, which saves a night's hotel bill and gives you a full first day in Siem Reap. The trade-offs are real, though: rural roads are unlit, sleep quality varies, and you'll arrive around 5–6am. Plenty of travelers prefer a day bus — you get the countryside views and arrive at a civilized hour.

Does the Phnom Penh to Siem Reap boat run all year?

No. The boat crosses the Tonle Sap lake, and it only runs in the high-water season — roughly August to February in a typical year. When water levels drop in the dry season, the service stops. If it's running during your trip, it's the most scenic option; if not, it's the bus or a flight.

Which airports do Phnom Penh to Siem Reap flights use?

Flights leave from Techo International Airport (KTI), about 30 km south of central Phnom Penh, and land at Siem Reap Angkor International (SAI), roughly 45–50 km east of Siem Reap town. Both airports are a real drive from their city centers, so budget the transfer time and cost — around $15 for a tuk-tuk or $15–30 for a car at the Phnom Penh end, and $25–40 for a car at the Siem Reap end.

Once you roll into Siem Reap, getting around town is its own adventure — our tuk-tuks and ride apps guide covers fair fares and the apps that fix the price upfront. Heading onward to Thailand afterwards? Read the border status page first — every land crossing is currently closed, so that leg is fly-only. More routes and walkthroughs live in Getting Around.