Business class flights from Dallas (DFW) to Siem Reap (REP) start from $2,650 round-trip — up to 40% below published airline prices. The ~17 hours journey covers 8,954 miles, with 3 airlines offering lie-flat seats on this route. Best time to book: 3–6 months in advance for best fares.
DFW → REP
Dallas to Siem Reap Business Class
From$2,650
Route Overview
Starting From
$2,650 round-trip
Flight Duration
~17 hours
Distance
8,954 miles
Airlines
3 carriers
Best Value
Jan, Feb, Mar
Savings
Up to 60% off retail
Route Intelligence
Business Class from Dallas to Siem Reap
Siem Reap exists for one reason most travelers care about: Angkor. The temple complexes there — Angkor Wat at sunrise, the tree-strangled ruins of Ta Prohm, the stone faces of Bayon — draw people from every continent, and increasingly they're pairing that trip with genuine business class comfort rather than gutting themselves through a long economy slog. From Dallas, that's a fair trade to insist on, because there's no direct flight and no way around a full day of travel each way.
Airlines & Cabin Experience
There's no nonstop from DFW to REP, so every Dallas to Siem Reap business class itinerary routes through a major Asian or Middle Eastern hub, and the connection you choose shapes the whole trip. Singapore Airlines is the standout for the transpacific leg — its Business Class seat is a genuine 1-2-1 lie-flat product, the crew service is consistently the most polished in the sky, and Book the Cook lets you pre-order dishes like Hainanese chicken rice before you even board. The catch is that Singapore's own metal doesn't fly into Siem Reap directly, so you'll typically connect onward via Singapore Changi on a partner or codeshare for the short regional hop. Thai Airways offers a different rhythm: its Royal Silk Class staggered lie-flat seats aren't quite as sharp as Singapore's newest cabins, but the Bangkok connection is short, convenient, and drops you into Southeast Asia's biggest hub with spa-lounge access if you've got a long layover. Cathay Pacific routes through Hong Kong with a reverse herringbone Business cabin — a favorite among aisle-seat purists — and the Pier First and Business lounges at HKG are worth arriving early for on their own merits.
Pricing & Best Time to Fly
Pricing on this route swings hard depending on carrier, season, and how far out you book. Through our consolidator fares, round-trip Dallas to Siem Reap business class runs $2,650 to $7,500, with the wide range coming from carrier choice (Thai and Cathay tend to price lower than Singapore), how flexible the ticket is, and how close to departure you're booking. January through March and November-December are both the best value window and the best weather window — Cambodia's dry season keeps temples comfortable for walking and photography, and airlines often have more premium inventory open on off-peak dates within those months. April through October brings Southeast Asia's rainy season, which isn't a dealbreaker for temple visits but does mean afternoon downpours and higher humidity.
Why Book Through BestBusinessClass.com
On the ground logistics: this is a 17-hour-plus journey door to door once you count the connection, so layover length matters as much as cabin choice. A 2-3 hour connection keeps momentum; anything under 90 minutes on an ultra-long-haul itinerary like this is asking for trouble if the first leg runs late. Bangkok and Singapore connections tend to be smoother for jet lag recovery than Hong Kong, simply because the time zone lines up closer to Cambodia's. Whichever carrier you fly, request an aisle seat near the front of the Business cabin for lie-flat comfort and easier bathroom access on the long westbound leg, and know that award seats and discounted Business fares on this route disappear fast in the January-March window — that's peak Angkor season for a reason.
Travel Tips
Booking through a consolidator fare desk rather than a standard travel site is where the real savings show up on a route this long, since wholesale fares aren't listed on public search engines and inventory shifts week to week.
Airline Comparison
Singapore Airlines
Singapore Business
Lie-flat, 1-2-1
Award-winning cabin, Book the Cook dining
Read Full Review →
Thai Airways
Royal Silk Class
Lie-flat staggered, 1-2-1
Thai hospitality, spa treatments
Read Full Review →
Cathay Pacific
Cathay Business
Lie-flat reverse herringbone, 1-2-1
Hong Kong hub, Pier lounge
Read Full Review →Top Rated
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The Business Class Standard
Lie-Flat Guarantee
We only sell true Business Class. 180° fully flat beds on all long-haul routes, ensuring you arrive rested.
Premium Lounges
Access the world's finest lounges. Enjoy pre-flight dining, showers, and quiet workspaces before you board.
Priority Service
Skip the queues. Your ticket includes fast-track security, priority boarding, and premium baggage handling.
The Business Class Standard
Lie-Flat Guarantee
We only sell true Business Class. 180° fully flat beds on all long-haul routes, ensuring you arrive rested.
Premium Lounges
Access the world's finest lounges. Enjoy pre-flight dining, showers, and quiet workspaces before you board.
Priority Service
Skip the queues. Your ticket includes fast-track security, priority boarding, and premium baggage handling.
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