Cheap flights from Udon Thani to Siem Reap

Udon Thani
UTH
Siem Reap
SAI

Flight deals from Udon Thani to Siem Reap

Below you can see the best deals on flights Udon Thani — Siem Reap for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 17 August, from $165.

Top 10 cheap flights from Udon Thani to Siem Reap

DD
FD
K6
$ 169

Udon Thani — Siem Reap

07:40—12:25
9 Aug 2026
28 h 45 m
2 stops
DD
FD
K6
$ 169

Udon Thani — Siem Reap

07:40—12:25
9 Aug 2026
28 h 45 m
2 stops
DD
FD
$ 171

Udon Thani — Siem Reap

18:00—16:10
11 Aug 2026
46 h 10 m
1 stop
DD
FD
K6
$ 172

Udon Thani — Siem Reap

07:40—12:25
14 Aug 2026
28 h 45 m
2 stops
DD
FD
K6
$ 172

Udon Thani — Siem Reap

07:40—12:25
14 Aug 2026
28 h 45 m
2 stops
DD
VZ
K6
$ 173

Udon Thani — Siem Reap

18:00—21:40
11 Aug 2026
27 h 40 m
2 stops
DD
FD
$ 174

Udon Thani — Siem Reap

16:20—16:10
11 Aug 2026
47 h 50 m
1 stop
SL
FD
$ 175

Udon Thani — Siem Reap

20:35—16:10
11 Aug 2026
43 h 35 m
1 stop
SL
FD
K6
$ 175

Udon Thani — Siem Reap

09:40—12:00
10 Aug 2026
26 h 20 m
2 stops
DD
VZ
K6
$ 177

Udon Thani — Siem Reap

16:20—21:40
11 Aug 2026
29 h 20 m
2 stops

Prices were found in the last 72 hours and may change — check the exact price when you continue.

About the Udon Thani — Siem Reap flight

Looking for cheap flights from Udon Thani to Siem Reap? There are no direct flights on this route, but you can compare convenient connections and fares from different airlines, then book your Udon Thani — Siem Reap ticket online.

There are no direct flights — tickets are sold with a connection (usually via Suvarnabhumi Airport), the whole trip with a connection takes about 41 h 20 min, flights are operated by Thai Airways, Bangkok Airways, Thai Vietjet Air, Thai AirAsia, the distance between the cities is around 457 km.

Planning your trip? You may find our Siem Reap travel guide, how to get from the airport into town and Siem Reap weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

Facts about this route

from $165Min. price
AugustCheapest
DecemberPeak season
NoDirect flights
457 kmDistance
5 hTravel time

Flight ticket prices by day: Udon Thani — Siem Reap

Below is a calendar of the lowest flight ticket prices for Udon Thani — Siem Reap by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $165 in August, and the most expensive are around $177 in December. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Average one-way fares from Udon Thani to Siem Reap by month. Tickets are usually cheapest in June (around $153) and priciest in December (about $227) — use the table and chart below to pick the best time to fly.

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$221highMay$159lowSep$153low
Feb$208highJun$153lowOct$165medium
Mar$172mediumJul$202highNov$208high
Apr$196highAug$196highDec$227high

Some values are estimated based on seasonality.

When to fly

Weather in Siem Reap: it is warmest in April (up to 35 °C on average) and coolest in December (around 30 °C). The driest month is January.

Tickets are usually cheapest in August and most expensive in December. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · Siem Reap

Dry and wet days · Siem Reap

Wind speed and direction · Siem Reap

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How to get the best deal on a Udon Thani — Siem Reap ticket

  • Book ahead: fares for Udon Thani — Siem Reap are usually lower 3–8 weeks before departure than at the last minute.
  • Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
  • The cheapest month to fly to Siem Reap is usually August — plan your trip around it if your dates are flexible.
  • There are no direct flights — travellers usually connect via Suvarnabhumi Airport. Compare different connections: a layover adds time but lowers the price.
  • Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
  • Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
  • Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Airlines

Flights on the Udon Thani — Siem Reap route are operated by 4 airlines; Thai Airways runs the most flights. There are no direct flights — compare carriers and convenient connections below.

There are no direct flights on the Udon Thani — Siem Reap route. Showing airlines offering connecting flights.
  • Thai AirwaysTG
    WebsiteFleet: 7715M pax/year
    • UTH → BKK → SAI (with stopover)
    Open →
  • Bangkok AirwaysPG
    WebsiteFleet: 254.3M pax/year
    • UTH → BKK → SAI (with stopover)
    Open →
  • Thai Vietjet AirVZ
    WebsiteFleet: 186.2M pax/year
    • UTH → BKK → SAI (with stopover)
    Open →
  • Thai AirAsiaFD
    WebsiteFleet: 5618.9M pax/year
    • UTH → BKK → SAI (with stopover)
    Open →

Cities and airports on the Udon Thani — Siem Reap route

Flights Udon Thani — Siem Reap depart from Udon Thani International Airport and arrive at Siem Reap International Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Udon Thani

UTH
Thailand
About the cityHow to get thereWeatherAll about the country Thailand
Arrival

Siem Reap

SAI
Cambodia
About the cityHow to get thereWeatherAll about the country Cambodia
Departure airports
Arrival airports

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Frequently asked questions about the Udon Thani — Siem Reap flight

How long is the flight from Udon Thani to Siem Reap?

There are no direct flights, so travel time depends on the connection in Suvarnabhumi Airport. Based on search data, the whole trip takes about 41 h 20 min including the layover.

How far is it from Udon Thani to Siem Reap?

The distance from Udon Thani to Siem Reap is about 457 km.

Are there direct flights from Udon Thani to Siem Reap?

There are no nonstop flights on this route — tickets are only available with a connection (usually via Suvarnabhumi Airport).

Which airlines fly from Udon Thani to Siem Reap?

Airlines operating Udon Thani — Siem Reap include Thai Airways, Bangkok Airways, Thai Vietjet Air, Thai AirAsia. See the full list with schedules in the "Airlines" section on this page.

Which airports do Udon Thani — Siem Reap flights use?

Flights from Udon Thani depart from Udon Thani International Airport, and arrive at Siem Reap International Airport. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from Udon Thani to Siem Reap?

The price of a Udon Thani — Siem Reap ticket depends on your travel date, season and demand: it is usually cheapest to fly in August, and most expensive in December. Tickets typically cost between $165 and $177. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights Udon Thani — Siem Reap?

Flights Udon Thani — Siem Reap are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is August. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from Udon Thani to Siem Reap?

To catch a low fare Udon Thani — Siem Reap, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually August.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

Where else you can fly from Udon Thani

See all
BangkokPhuketChiang MaiHat YaiPattayaHanoiHo Chi Minh City

Where else you can fly from Siem Reap

See all
BangkokHo Chi Minh CityHanoiSingaporePhuketKuala LumpurDa NangSihanoukvilleKolkataKunmingLuang PrabangPhu QuocPakseBuon Ma ThuotDa LatHueTuy HoaNha TrangVinh

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