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3 Week Thailand Tours

Looking to discover the best of Thailand on a 3 week tour? Then choose from our range of unique multi-day cruises, sailing adventures and guided tours with three leading tour operators that explore Thailand. February, March and May are the most popular months to travel to Thailand and we have 427 tour departures available.
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5 Tours (427 Tour Departures)
21 Day Thailand & Vietnam: Mountains & Coastlines with G Adventures
Tour

21 Days Bangkok to Ho Chi Minh City
Operated By: G Adventures
Departures: Feb 2026 to Mar 2026
Trip Styles: Adventure, Small Group, 18-30's
Visit: Vietnam, Thailand
Exclusive Savings
From
US$2,017
Save 67
Per Person
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21 Day Epic Vietnam to Cambodia with Intrepid Travel
Tour

21 Days Hanoi to Bangkok
Operated By: Intrepid Travel
Departures: Feb 2026 to Dec 2027
Trip Styles: Adventure, Small Group, Rail, 18-30's
Visit: Vietnam, Cambodia, Thailand
Exclusive Savings
From
US$1,557
Save 184
Per Person
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21 Day Southeast Asia: Hilltribes & Street Food with G Adventures
Tour

21 Days Bangkok to Singapore
Operated By: G Adventures
Departures: Jan 2026 to Dec 2028
Visit: Malaysia, Thailand, Singapore
Great Adventure Sale
Exclusive Savings
From
US$1,690
Save 448
Per Person
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21 Day Southeast Asia: Bangkok, Laos & The Cardamom Mountains with G Adventures
New ReleaseTour

21 Days Siem Reap to Luang Prabang
Operated By: G Adventures
Departures: May 2026 to Dec 2026
Trip Styles: Adventure, Small Group
Visit: Cambodia, Thailand, Laos
Exclusive Savings
From
US$6,886
Save 225
Per Person
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21 Day Thailand, Malaysia and Singapore Escapade with Contiki
Tour

21 Days Bangkok to Singapore
Operated By: Contiki
Departures: Jan 2026 to Mar 2027
Trip Styles: Coach, 18-30's, Scenic
Visit: Thailand, Malaysia, Singapore
Worldwide Sale
Exclusive Savings
From
US$3,331
Save 513
Per Person
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Travel Styles

18-30's Tours Adventure Tours Coach Tours Cycling Tours Family Tours Festivals & Events Tours Food & Wine Tours Rail Tours Short Break Tours Small Group Tours Walking & Hiking Tours

Trip Lengths

10 Day 2 Week 3 Week 7 Day

Departure Months

January February March April May June July August September October November December

Cities

Bangkok

Routes

Bangkok to Bangkok Bangkok to Chiang Mai Bangkok to Ho Chi Minh City Bangkok to Phuket Hanoi to Bangkok Ho Chi Minh City to Bangkok

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