There are 7 ways to get from Udon Thani to Siem Reap by plane, train, bus or car

Select an option below to see step-by-step directions and to compare ticket prices and travel times in Rome2rio's travel planner.

Recommended option

Fly from Udon Thani  •  3 h 16 min

  1. Fly from Udon Thani (UTH) to Siem Reap (REP) UTH - REP

$89 - $292

Cheapest option

Bus  •  15 h 15 min

  1. Take the bus from Udonthani to Nakhon Ratchasima
  2. Take the bus from Nakhon Ratchasima to Aranyaprathet
  3. Take the bus from Aranyaprathet to Siem Reap

$20 - $25

5 alternative options

Train to Vientiane, fly  •  14 h 51 min

  1. Take the train from Udon Thani to Nong Khai
  2. Fly from Vientiane (VTE) to Siem Reap (REP) VTE - REP

$175 - $444

Bus via Roi Et  •  12 h 54 min

  1. Take the bus from Udon Thani to Khon Kaen
  2. Take the bus from Khon Kaen to Roi Et 874
  3. Take the bus from Roi Et to Aranyaprathet
  4. Take the bus from Aranyaprathet to Siem Reap

$23 - $35

Bus Nakhonchai Air  •  19 h 52 min

  1. Take the bus from Udonthani to Bangkok Mochit Bus Terminal
  2. Take the bus from Bangkok Mochit Bus Terminal to Siem Reap Cambodia

$44

Train, bus  •  21 h 12 min

  1. Take the train from Udon Thani to Hua Lamphong
  2. Take the train from Hua Lamphong to Aranyaprathet
  3. Take the bus from Aranyaprathet to Siem Reap

$27 - $92

Drive  •  9 h 11 min

  1. Drive from Udon Thani to Siem Reap 377 miles

$45 - $75

What companies run services between Udon Thani, Thailand and Siem Reap, Cambodia?

Thai AirAsia, Thai Smile and three other airlines fly from Udon Thani to Siem Reap every 2 hours. Alternatively, you can take a bus from Udon Thani to Siem Reap via Khon Kaen, Roi Et, and Aranyaprathet in around 12 h 54 min.

Airlines
Lao Airlines
Website
laoairlines.com
Flights from Vientiane to Siem Reap via Pakse
Ave. Duration
4 h 32 min
When
Monday, Tuesday, Wednesday, Friday and Saturday
Estimated price
$120 - $340
Flights from Vientiane to Siem Reap via Luang Prabang
Ave. Duration
3 h 52 min
When
Monday, Wednesday, Thursday, Friday, Saturday and Sunday
Estimated price
$210 - $550
Flights from Vientiane to Siem Reap via Savannakhet, Pakse
Ave. Duration
5 h 55 min
When
Monday, Wednesday and Friday
Estimated price
$120 - $340
Thai AirAsia
Website
airasia.com
Flights from Udon Thani to Siem Reap via Don Muang
Ave. Duration
3 h 45 min
When
Every day
Estimated price
$60 - $180
Flights from Udon Thani to Siem Reap via Chiang Mai, Don Muang
Ave. Duration
7 h
When
Every day
Estimated price
$95 - $240
Cambodia Angkor Air
Website
cambodiaangkorair.com
Flights from Vientiane to Siem Reap via Pakse
Ave. Duration
3 h 5 min
When
Tuesday and Saturday
Estimated price
$120 - $340
Flights from Vientiane to Siem Reap via Phnom Penh
Ave. Duration
5 h
When
Tuesday
Estimated price
$310 - $700
Flights from Vientiane to Siem Reap via Phnom Penh, Ho Chi Minh City
Ave. Duration
5 h 40 min
When
Every day
Estimated price
$310 - $700
Vietnam Airlines
Website
vietnamairlines.com
Flights from Vientiane to Siem Reap via Hanoi
Ave. Duration
4 h 30 min
When
Every day
Estimated price
$310 - $700
Flights from Vientiane to Siem Reap via Phnom Penh
Ave. Duration
5 h
When
Tuesday
Estimated price
$310 - $700
Flights from Vientiane to Siem Reap via Phnom Penh, Ho Chi Minh City
Ave. Duration
5 h 40 min
When
Every day
Estimated price
$310 - $700
Thai Smile
Website
thaismileair.com
Flights from Udon Thani to Siem Reap via Suvarnabhumi
Ave. Duration
4 h
When
Every day
Estimated price
$150 - $430
Flights from Vientiane to Siem Reap via Suvarnabhumi
Ave. Duration
6 h 55 min
When
Every day
Estimated price
$120 - $390
Bangkok Airways
Website
bangkokair.com
Flights from Vientiane to Siem Reap via Suvarnabhumi
Ave. Duration
3 h 35 min
When
Every day
Estimated price
$200 - $700
Train operators
State Railway of Thailand
Website
railway.co.th
Train from Udon Thani to Nong Khai
Ave. Duration
38 min
Frequency
Once daily
Estimated price
$8 - $30
Schedules at
railway.co.th
Book at
12go.asia
3rd Class (Seat)
$1 - $6
2nd Class (Seat)
$8 - $12
2nd Class (Berth)
$18 - $24
1st Class (Berth)
$23 - $30
Train from Udon Thani to Hua Lamphong
Ave. Duration
10 h 30 min
Frequency
Once daily
Estimated price
$12 - $50
Schedules at
railway.co.th
Book at
12go.asia
3rd Class (Seat)
$5 - $9
2nd Class (Seat)
$12 - $18
2nd Class (Berth)
$22 - $30
1st Class (Berth)
$35 - $50
Train from Hua Lamphong to Aranyaprathet
Ave. Duration
5 h 40 min
Frequency
Once daily
Estimated price
$10 - $40
Schedules at
railway.co.th
Book at
12go.asia
3rd Class (Seat)
$3 - $7
2nd Class (Seat)
$10 - $14
2nd Class (Berth)
$19 - $26
1st Class (Berth)
$28 - $40
Bus operators
The Transport Company
Website
home.transport.co.th
Bus from Udon Thani to Khon Kaen
Ave. Duration
2 h
Frequency
Twice daily
Estimated price
$3 - $5
Schedules at
home.transport.co.th
Bus from Aranyaprathet to Siem Reap
Ave. Duration
2 h 56 min
Frequency
Twice daily
Estimated price
$4 - $6
Schedules at
home.transport.co.th
Phetprasert Tour
Phone
056 720 720
Website
phetprasert.com
Bus from Khon Kaen to Roi Et
Ave. Duration
1 h 40 min
Frequency
5 times a day
Estimated price
$4 - $5
Schedules at
phetprasert.com
Book at
12go.asia
Yellow Bus
Website
iloveyellowbus.com
Bus from Roi Et to Aranyaprathet
Ave. Duration
3 h 18 min
Frequency
Once daily
Estimated price
$12 - $20
Schedules at
iloveyellowbus.com
Suvarnabhumi Airport Bus
Website
suvarnabhumiairport.com
Bus from Udonthani to Nakhon Ratchasima
Ave. Duration
5 h 19 min
Frequency
Once daily
Estimated price
$8 - $13
Schedules at
suvarnabhumiairport.com
bus
Bus from Nakhon Ratchasima to Aranyaprathet
Ave. Duration
5 h
Frequency
5 times a day
Estimated price
$7
Nakhonchai Air
Website
nakhonchaiair.com
Bus from Udonthani to Bangkok Mochit Bus Terminal
Ave. Duration
8 h 52 min
Frequency
Every 4 hours
Estimated price
$16
Schedules at
www2.nakhonchaiair.com
Book at
nakhonchaiair.com
Nattakan Transport
Bus from Bangkok Mochit Bus Terminal to Siem Reap Cambodia
Ave. Duration
10 h
Frequency
Twice daily
Estimated price
$28
Schedules at
nattakan-transport.com
Book at
bookmebus.com

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Questions & Answers

How far is it from Udon Thani to Siem Reap?

The distance between Udon Thani and Siem Reap is 465 km. The road distance is 603 km.

What is the cheapest way to get from Udon Thani to Siem Reap?

The cheapest way to get from Udon Thani to Siem Reap is to bus which costs ฿600 - ฿800 and takes 15 h 15 min.

What is the fastest way to get from Udon Thani to Siem Reap?

The quickest way to get from Udon Thani to Siem Reap is to fly which takes 3 h 16 min and costs ฿2700 - ฿9500.

Is there a direct bus between Udon Thani and Siem Reap?

No, there is no direct bus from Udon Thani to Siem Reap. However, there are services departing from Udon Thani and arriving at Siem Reap via Khon Kaen, Roi Et and Aranyaprathet. The journey, including transfers, takes approximately 12 h 54 min.

How long does it take to get from Udon Thani to Siem Reap?

It takes approximately 3 h 16 min to get from Udon Thani to Siem Reap, including transfers.