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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 821 departures available.
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13 trips (821 trip Departures)
21 Day Vietnam & Cambodia Intro with Intro Travel
Tour
 (3)

21 Days Hanoi to Siem Reap
Operated By: Intro Travel
Departures: Jan 2026 to Nov 2027
Trip Styles: Small Group, 18-30's, Scenic
Visit: Vietnam, Cambodia
Exclusive Savings
From
US$2,398
Save 135
Per Person
View Trip
21 Day Grand Tour of Vietnam & Cambodia with Emerald Cruises
River Cruise
 (4)

21 Days Hanoi to Siem Reap
Cruise Line: Emerald Cruises
Ship: Emerald Harmony
Departures: Jan 2026 to Apr 2027
Rivers: Mekong
Visit: Vietnam, Cambodia
Fly Free Economy
Exclusive Savings
Inside
-
River View
$7,801
Balcony
$8,286
Suite
$10,517
From
US$7,801
Save 5,635
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: Jan 2026 to Dec 2026
Trip Styles: Adventure, Small Group
Visit: Vietnam
Exclusive Savings
From
US$3,085
Save 99
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
Departures: Dec 2025 to Mar 2026
Trip Styles: Adventure, Small Group, 18-30's
Visit: Vietnam, Thailand
Exclusive Savings
From
US$1,493
Save 736
Per Person
View Trip
21 Day Grand Tour of Vietnam & Cambodia with Emerald Cruises
River Cruise
 (4)

21 Days Hanoi to Ho Chi Minh City
Cruise Line: Emerald Cruises
Ship: Emerald Harmony
Departures: Jan 2026 to Apr 2027
Rivers: Mekong
Visit: Vietnam, Cambodia
Fly Free Economy
Wave Offer
Exclusive Savings
Inside
-
River View
$6,516
Balcony
$7,001
Suite
$10,226
From
US$6,516
Save 6,799
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: Feb 2026 to Aug 2027
Trip Styles: Adventure, Small Group
Visit: Indonesia
Exclusive Savings
From
US$3,200
Save 109
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: Jan 2026 to Dec 2028
Visit: Malaysia, Thailand, Singapore
Exclusive Savings
From
US$2,036
Save 69
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: May 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 Thailand, Malaysia and Singapore Escapade with Contiki
Tour

21 Days Bangkok to Singapore
Operated By: Contiki
Departures: Dec 2025 to Mar 2027
Trip Styles: Coach, 18-30's, Scenic
Visit: Thailand, Malaysia, Singapore
Exclusive Savings
From
US$3,672
Save 522
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: Dec 2025 to Dec 2026
Visit: Vietnam, Cambodia
Exclusive Savings
From
US$2,978
Save 232
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: Dec 2025 to Dec 2028
Trip Styles: Adventure, Small Group, 18-30's
Visit: Indonesia
Exclusive Savings
From
US$1,643
Save 776
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
Exclusive Savings
From
US$2,861
Save 95
Per Person
View Trip
21 Day Epic Vietnam to Cambodia with Intrepid Travel
Tour

21 Days Hanoi to Bangkok
Operated By: Intrepid Travel
Departures: Dec 2025 to Dec 2027
Trip Styles: Adventure, Small Group, Rail, 18-30's
Visit: Vietnam, Cambodia, Thailand
Exclusive Savings
From
US$1,644
Save 60
Per Person
View Trip
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