Flying between Vietnam and Cambodia?

Travel Info
Also, any information on the tourist steam train up to the Chinese border would be appreciated.

Travel Tips

Vietnam Airlines flies between Hanoi (HAN) and HCMC (SGN) to/from Seam Reap (airport code REP). If you want to search on line, use Expedia as the other websites lie Travelocity or Orbitz do not service those routes.

Staring on February 17, there is an upscale bus line that serves the HCMC-Seam Reap route at a bargain price, about 1/10 to 1/20 of the cost of an air ticket:

" A bus company in Ho Chi Minh City is set to open a high-quality bus route to Cambodia鈥檚 Seam Reap province starting Feb 17, the first of its kind departing from Vietnam鈥檚 southern metro.

Saigon Passenger Transportation Company (Sapaco Tourist) said the bus, running two times per week would cross the international border gate of Moc Bai in Tay Ninh province to enter Cambodia.

Sapaco Tourist which operates on the HCMC-Phnom Penh route also provides passengers with traveling guidance.

With a distance of 550km between HCMC-Siem Reap, the trip would take 8 hours and cost US$20 per one-way ticket and $36 for a round one.

Tickets are available at 197 or 309 Pham Ngu Lao Street, District 1."

As for train service between Hanoi and the Chinese border at Dong Dang, check out http://www.vietnamopentour.com/transport...
You'll need to scroll the page way down to find it. Source(s): http://asiaforvisitors.com/cambodia/angk...
http://www.thanhniennews.com/travel/?cat...
http://www.vietnamopentour.com/transport...

Other Travel Tips
I am not sure what are you asking about. If you want to know how to travel the Southeast Asia, ask your Asian friends near you. They might have better tips for you.
For Vietnam & Cambodia: Call a travel agency, recommended by AARP, called "Avalon Waterways" (Europe) @ 1.877.797.8789. For the train information: Call "Grand Luxe Rail Journeys" @ 1.877.854.3545.
Vietnam Airlines flies between Vietnam and Cambodia. It's approx 120USD plus 14USD Departure tax (from Vietnam).

If you're heading to Bangkok, try www.airasia.com. They fly Bangkok - Phnom Penh for around 40USD then get the ferry or bus to Siem Reap.

If your only in Vietnam and on a budget, try the bus from HCMC to Phnom Penh (approx 12USD) then bus or ferry to Siem Reap.This will obviuosly add a day or two off travel time.

Good luck and have fun!
http://www.vietnaminfocus.info
There s Vietnam airline fly this route:
Hanoi - Phnom Penh
Hanoi - SiemRiep
Hanoi minh - Phnom Penh
Hochiminh - SiemRiep
And also Cambodia air (U4) fly Hanoi - Siemriep
But you also can travel by overland from Hochiminh - Phnompenh by bus or by boat.
There are some option from Hanoi to china border.
By train:
Hanoi - Beijing (every Tuesday and Friday start from Hanoi at 18.30)
Hanoi - Lao Cai (everyday have several train depart from Hanoi at 21.15 and 22.00) to Hakhau border
By Bus:
Hanoi - Nanning (everyday from Hanoi at 8am)
Hanoi - Friendship Border (Everyday)
Good luck