Business class flights from Miami (MIA) to Siem Reap (REP) start from $2,650 round-trip — up to 40% below published airline prices. The ~17 hours journey covers 9,714 miles, with 3 airlines offering lie-flat seats on this route. Best time to book: 3–6 months in advance for best fares.
MIA → REP
Miami to Siem Reap Business Class
From$2,650
Route Overview
Starting From
$2,650 round-trip
Flight Duration
~17 hours
Distance
9,714 miles
Airlines
3 carriers
Best Value
Jan, Feb, Mar
Savings
Up to 60% off retail
Route Intelligence
Business Class from Miami to Siem Reap
Siem Reap exists for one reason most travelers can name immediately: Angkor. The temple complex is genuinely one of the great архитектурал achievements anywhere, and Angkor Wat at sunrise, followed by a few unhurried days working through Ta Prohm, Bayon, and the outer temples, justifies the long trip on its own. But the town itself has grown into a legitimate destination — Pub Street energy at night, a serious food scene built around French colonial buildings and Khmer cooking, and some of the best-value boutique hotels in Southeast Asia. It's also a natural add-on to Bangkok, Hong Kong, or Singapore, which matters because there's no nonstop from the US and you'll be routing through one of those cities anyway.
Airlines & Cabin Experience
Miami to Siem Reap business class is a two-flight journey no matter how you slice it — figure a long transpacific or transatlantic leg to a Southeast Asian hub, then a short regional connector into REP. That structure actually works in your favor: the hard part of the trip happens on a widebody with a proper flat bed, and the last hop is often under three hours. Singapore Airlines routes through Changi with a connection via Singapore or sometimes Bangkok, and their business class is the benchmark in the region — 1-2-1 lie-flat seating, Book the Cook so you order your main course before you fly, and cabin crew that consistently rank among the best anywhere. Thai Airways connects through Bangkok, which is arguably the more convenient hub for REP given how many daily flights run between BKK and Siem Reap; Royal Silk Class uses a staggered lie-flat layout and leans into Thai hospitality with better legroom than you'd expect and occasional spa amenities on the ground. Cathay Pacific routes via Hong Kong with their reverse herringbone 1-2-1 product, which gives you more privacy per seat than Thai's staggered layout, plus access to The Pier lounge if your connection allows a stopover.
Pricing & Best Time to Fly
On pricing, this route rewards patience and flexibility. Retail business class fares on this itinerary routinely price above $8,000-9,000 round-trip through normal channels, which is why most travelers either downgrade to premium economy or skip the trip altogether. Through our consolidator fares, the same cabins run $2,650 to $7,500 round-trip depending on airline, season, and how far out you book. The wider range reflects real differences — Thai Airways and Cathay Pacific fares tend to sit lower, while Singapore Airlines commands a premium for its cabin reputation. January through March and November-December are the sweet spot both for weather in Cambodia (dry season, far more comfortable for temple-hopping) and for fare availability, since airlines release more premium inventory outside Chinese New Year and summer peak travel.
Why Book Through BestBusinessClass.com
Because this is roughly 17 hours of total flying spread across two segments, connection time matters more than most people realize. A 2-3 hour layover in Singapore, Bangkok, or Hong Kong is comfortable; anything under 90 minutes on the inbound leg is risky given how far MIA departures can run late. If you have flexibility, building in a one or two night stopover in Bangkok or Hong Kong breaks up the trip and lets you use lounge access you're already paying for. Business class fares on this route move with fuel surcharges and seasonal demand, so locking in a fare 2-3 months ahead, especially for the January-March window, tends to produce better pricing than booking last minute.
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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