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Ko Samui

Cheap flights from Philadelphia (PHL) to Ko Samui (USM)

PHL — USM
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Best time to book a flight from Philadelphia to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Ko Samui

What is the cheapest time of day to fly from PHL to USM?

Find hourly flight availability from Philadelphia to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 30, 2025.

When flying from Philadelphia to Ko Samui, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 31% versus a flight in the evening.

What is the cheapest day to fly from Philadelphia to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Ko Samui. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Philadelphia to Ko Samui flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Philadelphia to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Ko Samui.

  • Can I find deals for business class flights from Philadelphia to Ko Samui?

    Yes. Cheapflights offers flight deals from Philadelphia to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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Alternative routes for Philadelphia to Ko Samui

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