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Cheap flight deals from St. Louis to Koh Samui Starting at PHP 87,546

Whether you’re going for a one-way or round-trip to Koh Samui, we’ve got you covered! Check out these different flight options from St. Louis below.

  • Round-trip
      • STL07:00
        37h
        2 stops
        USM08:00
        Mon, Mar 10|St. Louis - Koh Samui|United Airlines
        USM08:55
        44h 58m
        2 stops
        STL17:53
        Mon, Mar 17|Koh Samui - St. Louis|Scoot
        PHP 87,546PHP 143,580
        39% OFF
        39% OFF
        PHP 143,580PHP 87,546

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Mon, Mar 10-Mon, Mar 17, arriving at Samui International Airport. One-way Prices start from PHP 87,546 including taxes and charges.

      • STL09:00
        39h 5m
        2 stops
        USM13:05
        Tue, Mar 4|St. Louis - Koh Samui|United Airlines
        USM13:25
        40h 28m
        2 stops
        STL17:53
        Mon, Mar 10|Koh Samui - St. Louis|Bangkok Airways
        PHP 90,685PHP 143,580
        37% OFF
        37% OFF
        PHP 143,580PHP 90,685

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Tue, Mar 4-Mon, Mar 10, arriving at Samui International Airport. One-way Prices start from PHP 90,685 including taxes and charges.

      • STL07:00
        50h 5m
        2 stops
        USM21:05
        Mon, Mar 17|St. Louis - Koh Samui|United Airlines
        USM16:25
        37h 28m
        2 stops
        STL17:53
        Mon, Mar 24|Koh Samui - St. Louis|Bangkok Airways
        PHP 92,223PHP 143,580
        36% OFF
        36% OFF
        PHP 143,580PHP 92,223

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Mon, Mar 17-Mon, Mar 24, arriving at Samui International Airport. One-way Prices start from PHP 92,223 including taxes and charges.

      • STL07:00
        42h 5m
        2 stops
        USM13:05
        Sun, Mar 16|St. Louis - Koh Samui|United Airlines
        USM16:25
        37h 28m
        2 stops
        STL17:53
        Sun, Mar 23|Koh Samui - St. Louis|Bangkok Airways
        PHP 92,693
        PHP 92,693

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Sun, Mar 16-Sun, Mar 23, arriving at Samui International Airport. One-way Prices start from PHP 92,693 including taxes and charges.

      • STL07:00
        48h 35m
        2 stops
        USM19:35
        Sat, Mar 22|St. Louis - Koh Samui|United Airlines
        USM16:25
        37h 28m
        2 stops
        STL17:53
        Thu, Mar 27|Koh Samui - St. Louis|Bangkok Airways
        PHP 93,498
        PHP 93,498

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Sat, Mar 22-Thu, Mar 27, arriving at Samui International Airport. One-way Prices start from PHP 93,498 including taxes and charges.

      • STL09:00
        44h 15m
        2 stops
        USM18:15
        Fri, Feb 21|St. Louis - Koh Samui|United Airlines
        USM13:25
        42h 31m
        2 stops
        STL18:56
        Fri, Feb 28|Koh Samui - St. Louis|Bangkok Airways
        PHP 96,414
        PHP 96,414

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Fri, Feb 21-Fri, Feb 28, arriving at Samui International Airport. One-way Prices start from PHP 96,414 including taxes and charges.

      • STL07:00
        47h 15m
        2 stops
        USM18:15
        Wed, Mar 26|St. Louis - Koh Samui|United Airlines
        USM13:30
        39h 22m
        2 stops
        STL16:52
        Sun, Mar 30|Koh Samui - St. Louis|Bangkok Airways
        PHP 119,586
        PHP 119,586

        Choose United Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with United Airlines departs from St. Louis Lambert International Airport on Wed, Mar 26-Sun, Mar 30, arriving at Samui International Airport. One-way Prices start from PHP 119,586 including taxes and charges.

      • STL18:29
        61h 6m
        2 stops
        USM19:35
        Sat, Mar 22|St. Louis - Koh Samui|American Airlines
        USM11:40
        47h 29m
        2 stops
        STL23:09
        Thu, Mar 27|Koh Samui - St. Louis|Cathay Pacific
        PHP 124,781
        PHP 124,781

        Choose American Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Sat, Mar 22-Thu, Mar 27, arriving at Samui International Airport. One-way Prices start from PHP 124,781 including taxes and charges.

      • STL06:15
        49h 20m
        2 stops
        USM19:35
        Mon, Mar 10|St. Louis - Koh Samui|American Airlines
        USM11:40
        47h 29m
        2 stops
        STL23:09
        Mon, Mar 17|Koh Samui - St. Louis|Cathay Pacific
        PHP 125,219
        PHP 125,219

        Choose American Airlines flights from St. Louis to Koh Samui. The one-way connecting flight with American Airlines departs from St. Louis Lambert International Airport on Mon, Mar 10-Mon, Mar 17, arriving at Samui International Airport. One-way Prices start from PHP 125,219 including taxes and charges.

      • STL06:15
        49h 20m
        2 stops
        USM19:35
        Sat, Mar 22|St. Louis - Koh Samui|Cathay Pacific
        USM11:40
        47h 29m
        2 stops
        STL23:09
        Thu, Mar 27|Koh Samui - St. Louis|Cathay Pacific
        PHP 125,291
        PHP 125,291

        Choose Cathay Pacific flights from St. Louis to Koh Samui. The one-way connecting flight with Cathay Pacific departs from St. Louis Lambert International Airport on Sat, Mar 22-Thu, Mar 27, arriving at Samui International Airport. One-way Prices start from PHP 125,291 including taxes and charges.

      • STL01:00 pm
        3h 5m
        Nonstop
        USM02:00 pm
        Sun, Feb 23|St. Louis - Koh Samui|United Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

St. Louis to Koh Samui flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. CX7740

    Cathay Pacific

    06:52

    STL

    4.1h

    08:58

    LAX

    S---T--
    Search

  2. CX881

    Cathay Pacific

    00:30

    LAX

    15.3h

    06:45

    HKG

    SMTWTFS

  3. CX6503

    Cathay Pacific

    16:15

    HKG

    3.3h

    18:35

    USM

    SMTWTFS

  4. CX7740

    Cathay Pacific

    06:52

    STL

    4.1h

    08:58

    LAX

    S---T--
    Search

  5. CX885

    Cathay Pacific

    12:25

    LAX

    15.5h

    18:55

    HKG

    S-T-T-S

  6. CX6503

    Cathay Pacific

    16:15

    HKG

    3.3h

    18:35

    USM

    SMTWTFS

  7. CX7740

    Cathay Pacific

    06:52

    STL

    4.1h

    08:58

    LAX

    S---T--
    Search

  8. CX883

    Cathay Pacific

    23:30

    LAX

    15.3h

    05:45

    HKG

    SMTWTFS

  9. CX6503

    Cathay Pacific

    16:15

    HKG

    3.3h

    18:35

    USM

    SMTWTFS

  10. AA3242

    American Airlines

    06:52

    STL

    4.1h

    08:58

    LAX

    SM--TF-
    Search

  11. CX881

    Cathay Pacific

    00:30

    LAX

    15.3h

    06:45

    HKG

    SMTWTFS

  12. CX6503

    Cathay Pacific

    16:15

    HKG

    3.3h

    18:35

    USM

    SMTWTFS

  13. UA1314

    United Airlines

    09:00

    STL

    4.6h

    11:38

    SFO

    SMTWTFS
    Search

  14. UA001

    United Airlines

    22:40

    SFO

    17.1h

    06:45

    SIN

    SMTWTFS

  15. PG968

    Bangkok Airways

    17:20

    SIN

    1.9h

    18:15

    USM

    SMTWTFS

  16. UA1314

    United Airlines

    09:00

    STL

    4.6h

    11:38

    SFO

    SMTWTFS
    Search

  17. UA001

    United Airlines

    22:40

    SFO

    17.1h

    06:45

    SIN

    SMTWTFS

  18. PG966

    Bangkok Airways

    12:15

    SIN

    1.9h

    13:10

    USM

    -M-W-F-

  19. AA4591

    American Airlines

    10:12

    STL

    1.4h

    11:34

    ORD

    S--WT-S
    Search

  20. CX807

    Cathay Pacific

    15:40

    ORD

    15.9h

    20:35

    HKG

    SMTWTFS

  21. CX6503

    Cathay Pacific

    16:15

    HKG

    3.3h

    18:35

    USM

    SMTWTFS

  22. LH449

    Lufthansa

    15:30

    STL

    8.9h

    07:25

    FRA

    --T-T-S
    Search

  23. TG921

    Thai Airways

    14:45

    FRA

    10.7h

    06:25

    BKK

    SMTWTFS

  24. PG131

    Bangkok Airways

    10:25

    BKK

    1.6h

    12:00

    USM

    SMTWTFS

  25. LH449

    Lufthansa

    15:30

    STL

    8.9h

    07:25

    FRA

    --T-T-S
    Search

  26. TG921

    Thai Airways

    14:45

    FRA

    10.7h

    06:25

    BKK

    SMTWTFS

  27. PG127

    Bangkok Airways

    10:10

    BKK

    1.5h

    11:40

    USM

    SMTWTFS

  28. LH449

    Lufthansa

    15:30

    STL

    8.9h

    07:25

    FRA

    --T-T-S
    Search

  29. TG921

    Thai Airways

    14:45

    FRA

    10.7h

    06:25

    BKK

    SMTWTFS

  30. PG123

    Bangkok Airways

    08:10

    BKK

    1.2h

    09:20

    USM

    SMTWTFS
Find more flights and airlines

When is the cheapest time to fly from St. Louis to Koh Samui?

These price trend charts carefully monitor and predict how flight prices from St. Louis to Koh Samui will change. Keep a close eye on them to understand when the best time to buy your tickets is.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from St. Louis (STL) to Koh Samui (USM) the cheapest?

    Airlines adjust prices for flights from St. Louis to Koh Samui based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from St. Louis (STL) to Koh Samui (USM) cost?

    According to Trip.com's data, the lowest price is around PHP 131,920.

  • What is the transportation method from the main airport to downtown in Koh Samui?

    • The distance from Samui International Airport to downtown is about 3 km, by taxi about 20 minutes.

  • How many airports are there in Koh Samui (USM)?

    There are 1 airport(s) near Koh Samui (USM): Samui International Airport.

How to find a cheap flight from St. Louis to Koh Samui

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | St. Louis to Koh Samui

Off-season for travelJanuary
Peak season for travelDecember
Flight distance14,554.87 km
Popular airlineAmerican Airlines

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