The best month to fly between Phnom Penh and Bangkok is July and the most expensive month to fly is January. (Average prices, based on 1578 datapoints.)
The best day to arrive at Phnom Penh is Friday and it would be best to avoid Wednesday, as prices are on average 105.32% higher than on Friday. (Average prices, based on 267 datapoints.)
The cheapest airline flying from Phnom Penh to Bangkok is Thai AirAsia. They are 59% cheaper than Thai Airways. (Average prices, based on 1583 datapoints.)