Cheap Flights from St Louis to Siem Reap
No deal from St Louis to Siem Reap has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from St Louis to Siem Reap, the lowest round-trip fare we recorded was $1530, in August. The typical fare was $4767. August was the cheapest month we saw and September the dearest.
The most recent price we saw on this route was $1837 on Singapore Airlines, United, and Vietnam Airlines, seen Oct 27. It is an unverified observation and may have changed.
See every deal <a href="/from/st-louis">from St Louis</a>, <a href="/to/siem-reap">to Siem Reap</a>, or the return direction <a href="/from/siem-reap/to/st-louis">Siem Reap to St Louis</a>.
Latest price we saw: St Louis to Siem Reap
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| St Louis (STL) to Siem Reap (SAI) | $1837 | 10.5¢ | Mar 7 – Mar 16 | Singapore Airlines, United, and Vietnam Airlines | Oct 27 | Check price |
Price history: St Louis to Siem Reap
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $1682 | $2916 | 29 |
| Sep 2026 | $3969 | $6582 | 10 |
| Aug 2026 | $1530 | $6099 | 51 |
| Jul 2026 | $3471 | $3471 | 2 |
Frequently asked questions
How many flight deals from St Louis to Siem Reap are on Sparkflights right now?
There are 0 verified deals from St Louis to Siem Reap on the board right now. The list refreshes hourly.
What is the lowest price ever seen from St Louis to Siem Reap?
The lowest fare we've recorded from St Louis to Siem Reap is $1530, based on 92 price observations over 4 months.
How much does a flight from St Louis to Siem Reap cost?
The typical round-trip fare we observed from St Louis to Siem Reap is $4767, against a recorded low of $1530. These are observations, not quotes.
When is the cheapest month to fly St Louis to Siem Reap?
August was the cheapest month we observed from St Louis to Siem Reap and September the dearest, over 4 months of data.
What is the current price from St Louis to Siem Reap?
The most recent fare our sweep saw from St Louis to Siem Reap is $1837, on Oct 27. It is an unverified observation rather than a verified deal, so check it before booking.