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3 Week Trips to South East Asia

Looking to explore South East Asia for 3 weeks? Then choose from our range of river cruises, adventures and guided tours with 6 of the best tour operators to South East Asia. November is the most popular month to travel to South East Asia and we have 773 departures available.
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13 trips (773 trip Departures)
21 Day Vietnam & Cambodia Intro with Intro Travel
Tour
 (3)

21 Days Hanoi to Siem Reap
Operated By: Intro Travel
Departures: Mar 2026 to Nov 2027
Trip Styles: Small Group, 18-30's, Scenic
Visit: Vietnam, Cambodia
Exclusive Savings
From
US$2,201
Save 399
Per Person
View Trip
21 Day Grand Tour of Vietnam & Cambodia with Emerald Cruises
River Cruise
 (5)

21 Days Hanoi to Siem Reap
Cruise Line: Emerald Cruises
Ship: Emerald Harmony
Departures: Oct 2026 to Nov 2027
Rivers: Mekong
Visit: Vietnam, Cambodia
Early Payment Discount
Exclusive Savings
Inside
-
River View
$7,520
Balcony
$8,005
Suite
$10,236
From
US$7,520
Save 7,228
Per Person
View Trip
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$1,470
Save 281
Per Person
View Trip
21 Day Indonesia Adventure: Java & Bali with G Adventures
Tour

21 Days Jakarta to Gili Trawangan
Operated By: G Adventures
Departures: Feb 2026 to Dec 2028
Trip Styles: Adventure, Small Group, 18-30's
Visit: Indonesia
Great Adventure Sale
Exclusive Savings
From
US$1,760
Save 741
Per Person
View Trip
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: Jul 2026 to Dec 2026
Trip Styles: Adventure, Small Group
Visit: Cambodia, Thailand, Laos
Exclusive Savings
From
US$6,886
Save 225
Per Person
View Trip
21 Day Grand Tour of Vietnam & Cambodia with Emerald Cruises
River Cruise
 (5)

21 Days Hanoi to Ho Chi Minh City
Cruise Line: Emerald Cruises
Ships: Emerald Harmony
Departures: Jan 2026 to Nov 2027
Rivers: Mekong
Visit: Vietnam, Cambodia
Early Payment Discount
Exclusive Savings
Inside
-
River View
$7,035
Balcony
$7,520
Suite
$9,751
From
US$7,035
Save 7,228
Per Person
View Trip
21 Day Thailand & Vietnam: Mountains & Coastlines with G Adventures
Tour

21 Days Bangkok to Ho Chi Minh City
Operated By: G Adventures
Departure: 08 March 2026
Trip Styles: Adventure, Small Group, 18-30's
Visit: Vietnam, Thailand
Exclusive Savings
From
US$2,017
Save 62
Per Person
View Trip
21 Day Walking in Vietnam & Cambodia Highlights with Explore Worldwide
Tour

21 Days Hanoi to Siem Reap
Operated By: Explore Worldwide
Departures: Feb 2026 to Dec 2026
Visit: Vietnam, Cambodia
Exclusive Savings
From
US$2,677
Save 573
Per Person
View Trip
21 Day Southeast Asia: Hilltribes & Street Food with G Adventures
Tour

21 Days Bangkok to Singapore
Operated By: G Adventures
Departures: Feb 2026 to Dec 2028
Visit: Malaysia, Thailand, Singapore
Great Adventure Sale
Exclusive Savings
From
US$1,690
Save 448
Per Person
View Trip
21 Day Indonesia: Java, Bali & Komodo Island with G Adventures
New ReleaseTour

21 Days Yogyakarta to Labuan Bajo
Operated By: G Adventures
Departures: Jul 2026 to Aug 2027
Trip Styles: Adventure, Small Group
Visit: Indonesia
Great Adventure Sale
Exclusive Savings
From
US$2,801
Save 711
Per Person
View Trip
21 Day Thailand, Malaysia and Singapore Escapade with Contiki
Tour

21 Days Bangkok to Singapore
Operated By: Contiki
Departures: Feb 2026 to Mar 2027
Trip Styles: Coach, 18-30's, Scenic
Visit: Thailand, Malaysia, Singapore
Worldwide Sale
Exclusive Savings
From
US$3,331
Save 474
Per Person
View Trip
21 Day Best of Java & Sumatra with G Adventures
New ReleaseTour

21 Days Medan to Surabaya
Operated By: G Adventures
Departures: Mar 2026 to Sep 2027
Trip Styles: Adventure, Small Group
Visit: Indonesia
Great Adventure Sale
Exclusive Savings
From
US$2,145
Save 836
Per Person
View Trip
21 Day Vietnam Explorer with Explore Worldwide
Tour

21 Days Hanoi to Ho Chi Minh city
Operated By: Explore Worldwide
Departures: Feb 2026 to Dec 2026
Trip Styles: Adventure, Small Group
Visit: Vietnam
Exclusive Savings
From
US$2,726
Save 574
Per Person
View Trip
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1 Month 10 Day 2 Week 3 Day 3 Week 7 Day

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