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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 5 of the best tour operators to South East Asia. November and December are the most popular months to travel to South East Asia and we have 478 departures available.
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9 trips (478 trip Departures)
21 Day Vietnam & Cambodia Intro with Intro Travel
Tour
 (3)

21 Days Hanoi to Siem Reap
Operated By: Intro Travel
Departures: Apr 2026 to Nov 2027
Visit: Vietnam, Cambodia
From
US$2,724
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: Oct 2026 to Nov 2027
Visit: Vietnam, Cambodia
From
US$3,310
Per Person
View Trip
21 Day Thailand, Malaysia and Singapore Escapade with Contiki
Tour

21 Days Bangkok to Singapore
Operated By: Contiki
Departures: May 2026 to Mar 2027
Trip Styles: Coach, 18-30's, Scenic
Visit: Thailand, Malaysia, Singapore
Exclusive Savings
From
US$3,922
Save 408
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: Aug 2026 to Sep 2027
Trip Styles: Adventure, Small Group
Visit: Indonesia
Exclusive Savings
From
US$2,455
Save 636
Per Person
View Trip
21 Day Epic Vietnam to Cambodia with Intrepid Travel
Tour

21 Days Hanoi to Bangkok
Operated By: Intrepid Travel
Departures: Apr 2026 to Dec 2027
Visit: Vietnam, Cambodia, Thailand
Exclusive Savings
From
US$1,183
Save 507
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
Exclusive Savings
From
US$3,102
Save 547
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: Apr 2026 to Dec 2026
Trip Styles: Adventure, Small Group, 18-30's
Visit: Indonesia
Exclusive Savings
From
US$1,814
Save 680
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: Apr 2026 to Dec 2028
Visit: Malaysia, Thailand, Singapore
Exclusive Savings
From
US$1,574
Save 550
Per Person
View Trip
21 Day Vietnam Explorer with Explore Worldwide
Tour

21 Days Hanoi to Ho Chi Minh city
Operated By: Explore Worldwide
Departure: 08 November 2026
Trip Styles: Adventure, Small Group
Visit: Vietnam
From
US$3,370
Per Person
View Trip
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