Flights Bangkok to Siem Reap (BKK-REP): Airlines, THB Fares

Bangkok to Siem Reap is a short, tourism-driven route — Siem Reap being the gateway town to the Angkor temple complex, one of Southeast Asia’s most visited sites. At around 21 flights a week and barely an hour in the air, it is an easy connection, carrying mostly visitors heading to Angkor, alongside regional and business travel.

Block time is about one hour. Demand on this route follows Cambodia’s tourism calendar closely, with the cooler, drier months drawing the largest numbers and firmest fares.

Corridor profile

The BKK–REP corridor runs about 21 departures a week across 3 carriers, with an average block time of 1.0 hours. The frequency figure counts every carrier on the route combined, not any single airline. This corridor scores 7/10 on our own catalogue demand ranking.

Our own demand score. This corridor scores 7/10. That is an editorial ranking we use to prioritise how deeply we cover a route — it is not a passenger count and not a price index. A high score means a corridor people search and where options exist, which usually means price competition. A low score does not mean a bad route; it means fewer options, and where options are few, flexibility gets expensive.

What frequency tells you when plans break. 21 weekly departures is ~3.0 departures a day — the next departure is usually same-day or next-day. That is why frequency matters more than price for anyone with a fixed commitment at the other end. A thin corridor deserves a buffer day before anything that cannot move, not because the airline is poor but because there is no spare inventory to shift you onto.

Airlines & baggage

Baseline baggage on BKK–REP runs 7–30 kg across the 2 of 3 carriers on the route for which we hold a row. These are carrier reference baselines, not entitlements attached to every ticket: cabin class, fare brand and frequent-flyer status all change the weight you actually get.

The labour-route uplift is conditional. Our data records a +10 kg uplift for Thai Airways on labour corridors. That uplift is a route-and-fare-class policy, not an entitlement stapled to every ticket: promotional and deep-discount fare brands frequently sit outside it, and the uplift applies to hold baggage only — it does not extend to the cabin allowance. Confirm it at ticketing and get it written on the ticket rather than trusting a promotional page.

Bags through-check only on one ticket. The carriers we hold rows for on this corridor are not all in the same alliance. A bag runs through to your final destination only when every sector sits on one ticket, or an interline agreement exists between the operators. Self-connect on two separate tickets to shave the total and you collect the bag, clear the transit country’s immigration, and check in again — and the time you must allow is far longer than a booking screen implies.

Airlines on this route

3 carriers operate BKK–REP — 1 full-service and 1 low-cost. Alliances present on the route: Star Alliance. Multiple carriers only affect price when both sides are actually selling in the same window. Combined corridor frequency is about 21 departures a week across all carriers.

Three carriers fly BKK-REP: Thai Airways on the full-service side, with Thai AirAsia and Cambodia Angkor Air covering the route as well. Thai Airways includes checked baggage and a fuller cabin; Thai AirAsia prices the seat low and charges baggage and extras separately. On a one-hour hop, many travellers fly with cabin baggage only — compare the all-in cost once you have added whatever you need to check.

What an alliance buys, and what it does not. Star Alliance on this route means through-checked bags, conditional lounge access, and — the part that matters — a realistic chance of being moved onto a partner’s aircraft when things break. What an alliance does not buy is compensation. That comes only from the law of the jurisdiction involved, never from a logo on the ticket.

Fare trends

We hold only 0 weekly captures for this corridor — too few to call a trend. Read what follows as an explanation of the mechanics rather than a forecast. We capture the lowest observed fare once a week and accumulate the series over time.

BKK-REP fares move with Cambodia’s tourism season. The cool, dry months are the busiest and dearest, and seats can firm up around the year-end peak — six to ten weeks of lead time is sensible for that window. Outside the season, fares ease and three to six weeks usually finds a good THB price. Travelling light keeps the cost down on a route this short.

Sparse data usually means a sparse market. Our capture cadence is identical on every corridor, so the number of readings reflects how often this route offers a fare to catch at all. Seasonal routes, charter-heavy routes and routes sold through narrow channels return values irregularly. Where that is the case, asking the airline or an agent directly gets you a truer picture faster than watching a search page.

Seasonality & best time to book

Our catalogue lists 3 carriers on this city pair. BKK–REP is a regional corridor with a shorter booking window than long-haul. The fare tracks low-cost promotional cycles and Thai long weekends more than any season at the destination, and Songkran plus the consecutive-holiday blocks are the tightest weeks of the year.

Bangkok–Siem Reap fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates.

The booking window matters more than the booking day. On a 1.0-hour corridor the fare tracks how many seats remain in each fare bucket, not which weekday you click buy. The folklore about a magic booking day has no support in the series we capture. What does show up is widening your travel dates by a day or two.

Thai public holidays are the controllable variable. The holiday calendar is published a year ahead and is the one part of the equation you know before the airline reprices. Shifting out of a consecutive-holiday week by even two days moves you off the tightest demand for both seats and rooms — a bigger effect than switching airline.

About Siem Reap

Our catalogue lists 3 carriers on this city pair. Siem Reap (REP) sits in Cambodia, uses KHR, and the visa position we record for a Thai passport is: visa-free 30 days (ASEAN). The flight from Bangkok runs about 1.0 hours. Siem Reap — Angkor Wat, visa-free 30 days

Siem Reap is the town that serves the Angkor Archaeological Park — the vast complex of temples, including Angkor Wat, built by the Khmer Empire and now a UNESCO World Heritage Site. The town itself has grown around that traffic, with a wide range of places to stay, eat and rest between temple visits. For travellers from Bangkok it is a focused, accessible trip: a short flight, a world-significant site, and a town geared entirely to making the visit easy.

The fare is in baht; the trip is not. Every price here is quoted in THB while ground costs at the destination are in KHR. Exchange spread and card conversion fees are the line most often omitted when comparing a whole-trip budget. Choosing to be charged in baht on a foreign terminal means accepting the merchant’s rate, which is almost never better than your issuing bank’s.

Passenger rights on BKK–REP

Our catalogue lists 3 carriers on this city pair. Departures from Thailand fall under Thailand CAAT; the return from Siem Reap falls under the destination’s civil-aviation regulator. The two regimes are not the same, and what you are owed changes with the direction of travel and the nationality of the operating carrier — never with the fare you paid.

No European-style compensation schedule applies here. The destination sits with the destination’s civil-aviation regulator, which typically imposes duty of care, re-routing and refund obligations but no fixed EU261-style cash bands. The enforceable floor is therefore the airline’s own conditions of carriage plus Thailand CAAT rules for departures from Thailand. Read the conditions of carriage before you buy — that is the document that actually binds you.

Baggage and delay are governed by different instruments. If a bag is lost or arrives late on an international journey, the basis of claim is the Montreal Convention 1999, which applies where both the origin and destination states are parties. Its ceilings are denominated in SDR and revised periodically, so only the current figure is citable. The practical consequence is that the two claims are independent: having no delay-compensation right does not remove a baggage claim, and the report should be filed at the baggage desk before you leave the airport.

FAQ

Which airlines fly Bangkok to Siem Reap?

The BKK-REP route is operated by Thai AirAsia, Cambodia Angkor Air and Thai Airways. Compare baggage, alliances and fares in the table above.

How long and how often is the BKK-REP flight?

Block time is ~1.0h, with ~21 flights per week across all carriers.

When is BKK-REP cheapest to book?

Book 4–8 weeks ahead; avoid Songkran, school holidays and peak season to save 15–30%.

What exactly is the lowest fare shown on this page?

It is the cheapest fare our cache has recorded on BKK–REP, captured one snapshot at a time. It is not an average, not a live quote and not a guarantee that a seat still exists at that price. Use it as a reference floor, then check live pricing.

What is the difference between a direct and a nonstop flight?

Direct means the flight number does not change, but the aircraft may still land en route. Nonstop means no intermediate landing at all. If the clock matters, filter on nonstop, not direct.

If my BKK–REP flight is cancelled, who is responsible?

The destination sits with the destination’s civil-aviation regulator, which generally imposes duty of care, re-routing and refunds but no fixed EU261-style cash bands. The enforceable floor is the airline’s conditions of carriage plus Thailand CAAT rules for departures from Thailand.

Will my bag be through-checked if I book two separate tickets?

No. Through-checking happens only when every sector is on one ticket or an interline agreement exists. On separate tickets you reclaim the bag, clear the transit country’s immigration and check in again — and a missed connection is a new ticket at your cost.

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Related

• BKK airport
• REP airport