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Route Details
Flight Duration
The flight from St. Louis to Phnom Penh takes approximately 19 hours, typically with one connection.
Airport Transfer
Phnom Penh Airport to city: Taxi is $15-20, 30 minutes to riverside. Tuk-tuks are $10-12. Use PassApp or Grab for rides. The city is spread out — you'll need tuk-tuks. Killing Fields tours are half-day. Budget 2 days max.
Visa & Entry Requirements
US passport holders can get visa on arrival for $30 (tourism, 30 days). Bring passport photos. E-visa available online ($36, processed in 3 days).
When to Book
Prices are unpredictable this close. Occasionally airlines release unsold seats at steep discounts, but you're more likely to pay a premium. Only viable if you have flexibility.
This is typically when St. Louis to Phnom Penh fares hit their lowest point. Airlines have a clear picture of demand but seats are still widely available. Set your price alert now to catch the dip.
For summer travel and major holidays, booking 3–6 months early locks in reasonable rates before demand spikes. Don't wait for the "perfect" price — set a target and track it.
Pro tip: Flight prices fluctuate hundreds of times per day based on demand, competitor pricing, and remaining seats. Rather than checking manually, set a Wildly price alert and we'll text you the momentSTL→PNH fares drop to your target price.
About Phnom Penh
Phnom Penh is Cambodia's capital and a city of contrasts — French colonial architecture, royal palaces, and the harrowing Killing Fields. It's chaotic, dusty, and the traffic is relentless. The food is good (Khmer curry, lok lak), and the riverside promenade is nice. Most people skip it for Siem Reap.
Highlights
- •Royal Palace and Silver Pagoda
- •Tuol Sleng Genocide Museum (S-21)
- •Killing Fields (Choeung Ek, 1 hour outside city)
- •Riverside promenade and Central Market
Best Time to Visit
November, December, January, February
November-February is dry season (75-85°F). March-May is brutally hot (95°F+). June-October is wet season (rain, flooding). Best weather is December-January.
Cost of Living
Cheap. Meals $2-6, hotels $15-50/night. Similar to Siem Reap prices.
Timezone & Jet Lag
UTC+7 (no daylight saving time). 12 hours ahead of US East Coast. Significant jet lag expected — plan for a few days to adjust.
Related Routes
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