Business class flights from Los Angeles (LAX) to Siem Reap (REP) start from $2,650 round-trip — up to 40% below published airline prices. The ~17 hours journey covers 8,147 miles, with 3 airlines offering lie-flat seats on this route. Best time to book: 3–6 months in advance for best fares.
LAX → REP
Los Angeles to Siem Reap Business Class
From$2,650
Route Overview
Starting From
$2,650 round-trip
Flight Duration
~17 hours
Distance
8,147 miles
Airlines
3 carriers
Best Value
Jan, Feb, Mar
Savings
Up to 60% off retail
Route Intelligence
Business Class from Los Angeles to Siem Reap
Siem Reap exists for one reason above all others: Angkor. The temple complex sprawls across roughly 150 square miles of Cambodian jungle, and Angkor Wat itself is only the headline act — Ta Prohm with its strangler figs, the faces of Bayon, the sunrise crowds at Angkor Wat's reflecting pools. Beyond the temples, Siem Reap has developed into a genuinely pleasant base, with a walkable old quarter, a strong food scene built around Khmer classics like fish amok, and a handful of excellent boutique hotels that cost a fraction of what you'd pay in Bangkok or Bali. It's a destination that rewards travelers who arrive rested, since most people hit the ground and go straight into multi-day temple touring in tropical heat.
Airlines & Cabin Experience
There's no nonstop from Los Angeles, so LAX to Siem Reap business class routes through one of three strong hubs, and each has a distinct personality. Singapore Airlines connects via Changi with its 1-2-1 lie-flat Business cabin — consistently rated among the best hard products flying, with the Book the Cook pre-order dining program letting you choose your meal before you even board. Thai Airways runs through Bangkok in Royal Silk Class, a staggered lie-flat 1-2-1 seat, and the Thai hospitality reputation is earned — expect warm service and, on select routes, spa treatments in the lounge. Cathay Pacific connects via Hong Kong with its reverse herringbone 1-2-1 seat, one of the more private business class designs in the sky, plus access to the Pier lounge, which regularly ranks among the world's best airport lounges. All three routings put you at roughly 17 hours total travel time including the connection, so the layover city matters — a few hours in Changi or the Pier lounge makes the second leg far more bearable.
Pricing & Best Time to Fly
Because this is a consolidator fare, pricing swings widely depending on how far out you book and which carrier has excess business class inventory to move. Our fares on this route run from about $2,650 to $7,500 round-trip, against retail business class fares on this itinerary that often start north of $6,000 and climb well past $10,000 in peak season. The lower end of that range typically requires booking 3-4 months ahead during shoulder periods; the higher end reflects premium departure dates or last-minute availability when inventory is tight. Because consolidator seats aren't published on Expedia or Google Flights, pricing and availability change week to week, which is exactly the kind of thing a Personal Travel Manager tracks for you rather than something you can game by refreshing a search engine.
Why Book Through BestBusinessClass.com
Timing matters more on this route than most. January through March and November through December are the sweet spot — Cambodia's dry season means comfortable temple-touring weather and generally more predictable fare availability, since it's shoulder season for the US-Asia business travel crowd that fills these cabins during peak summer and holiday windows. April through October brings Cambodia's wet season, with humidity and afternoon downpours that make Angkor touring harder, though fares can dip if you're flexible.
Travel Tips
For the flight itself, favor the carrier whose hub layover works best for your body clock — a Singapore connection lets you shower and stretch in one of the world's best airports, while Hong Kong's Pier lounge does the same with better food. Whichever airline you choose, book an aisle seat if you plan to move around on a 17-hour day, and don't underestimate jet lag recovery time before diving into sunrise temple visits.
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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