$380 Find Cheap Flights from Ontario to Bangkok - Compare and Save

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Everything you should know

Cheapest round-trip
$775
Typical prices: $769-$1,073
Korean Air
Thu 9/13Sun 9/16
ONT - BKK • 2 stops
Cheapest one-way
$380
Typical prices: $426-$617
Delta
Mon 11/26
ONT - BKK • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Ontario and Bangkok. You'll need to take a connecting flight to reach the destination.
Insights
Insights
Top routes
ONT - BKK
Cheapest • 9% average savings
ONT - DMK
Most popular
Insights
Insights
When to book
15 weeks
in advance
Our data shows that travelers who book at least 15 weeks in advance save around 12% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 11% price drop
December
Most popular
Good to know
+1
Good to know
+1
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Flight Deals

Cheap Flights from Ontario to Bangkok (ONT-BKK)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Bangkok

Sun, Sep 13 - Wed, Sep 16
Korean Air Logo
6:00 am - 9:45 pmONT  Ontario-BKK Bangkok Suvarnabhumi
25h 45m2 stops Seattle/Tacoma Intl Incheon Intl
Korean Air Logo
2:35 am - 5:19 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
28h 44m2 stops Incheon Intl Seattle/Tacoma Intl
$775Korean Air
Sun, Sep 20 - Sun, Oct 4
China Airlines Logo
12:10 am - 12:10 pmONT  Ontario-BKK Bangkok Suvarnabhumi
22h 00m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
10:50 am - 6:00 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
21h 10m1 stop Taipei City Taiwan Taoyuan Intl
$806China Airlines
Sat, Sep 12 - Thu, Sep 17
China Airlines Logo
12:45 am - 4:20 pmONT  Ontario-BKK Bangkok Suvarnabhumi
25h 35m1 stop Taipei City Taiwan Taoyuan Intl
China Airlines Logo
10:50 am - 6:00 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
21h 10m1 stop Taipei City Taiwan Taoyuan Intl
$817China Airlines
Thu, Dec 3 - Fri, Dec 11
Delta Logo
7:00 am - 12:45 amONT  Ontario-BKK Bangkok Suvarnabhumi
26h 45m2 stops Seattle/Tacoma Intl Incheon Intl
Delta Logo
12:55 am - 10:59 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
37h 04m2 stops Incheon Intl Seattle/Tacoma Intl
$822Delta
Mon, Feb 1 - Tue, Mar 2
Delta Logo
6:00 am - 9:30 pmONT  Ontario-BKK Bangkok Suvarnabhumi
24h 30m2 stops Salt Lake City Incheon Intl
Delta Logo
9:40 am - 10:43 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
28h 03m2 stops Incheon Intl Seattle/Tacoma Intl
$823Delta
Wed, Sep 30 - Sun, Oct 11
Korean Air Logo
6:00 am - 11:35 pmONT  Ontario-BKK Bangkok Suvarnabhumi
27h 35m2 stops Seattle/Tacoma Intl Incheon Intl
Korean Air Logo
11:30 pm - 5:12 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
31h 42m2 stops Incheon Intl Seattle/Tacoma Intl
$828Korean Air
Tue, Sep 15 - Fri, Sep 18
Multiple Airlines Logo
6:00 am - 11:35 pmONT  Ontario-BKK Bangkok Suvarnabhumi
27h 35m2 stops Seattle/Tacoma Intl Incheon Intl
Multiple Airlines Logo
2:35 am - 10:40 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
34h 05m2 stops Incheon Intl Seattle/Tacoma Intl
$830Multiple Airlines
Mon, Oct 12 - Mon, Oct 19
STARLUX Airlines Logo
11:30 pm - 4:40 pmONT  Ontario-BKK Bangkok Suvarnabhumi
27h 10m1 stop Taipei City Taiwan Taoyuan Intl
STARLUX Airlines Logo
1:10 pm - 5:05 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
17h 55m1 stop Taipei City Taiwan Taoyuan Intl
$833STARLUX Airlines
Mon, Sep 21 - Sun, Oct 4
STARLUX Airlines Logo
11:30 pm - 12:00 pmONT  Ontario-BKK Bangkok Suvarnabhumi
22h 30m1 stop Taipei City Taiwan Taoyuan Intl
STARLUX Airlines Logo
5:50 pm - 5:05 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
37h 15m1 stop Taipei City Taiwan Taoyuan Intl
$833STARLUX Airlines
Sun, Jan 10 - Fri, Jan 22
United Airlines Logo
6:53 pm - 5:10 amONT  Ontario-BKK Bangkok Suvarnabhumi
43h 17m2 stops San Francisco Tokyo Haneda
United Airlines Logo
9:10 am - 8:26 pmBKK  Bangkok Suvarnabhumi-ONT Ontario
26h 16m2 stops Tokyo Haneda San Francisco
$858United Airlines
Booking Insights

Price, demand and travel trends for Ontario to Bangkok flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Ontario to Bangkok with more confidence.

How much is a round-trip flight from Ontario to Bangkok?

Round-trip flights from Ontario to Bangkok start at $775. Prices are typical for this route right now, with typical round-trip fares ranging from $769 to $1,073. The lowest price found in the past 5 days was $775 on Korean Air.

What's the cheapest day of the week to fly from Ontario to Bangkok?

Monday is the cheapest day of the week to fly from Ontario to Bangkok, it is 9% cheaper than the average day. Friday is the most expensive day with flight prices 18% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Ontario to Bangkok?

  • January is the cheapest month to fly from Ontario to Bangkok at $764 round-trip.
  • June ($1,539) and December ($1,494) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 101% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Ontario to Bangkok the cheapest?

Flights from Ontario to Bangkok are cheapest 15 weeks before departure. Booking in this window typically costs about 12% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Ontario to Bangkok flights

Low season

August

Cheapest flight

$380
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly with an average 74% increase in price.
Flight from Ontario to Bangkok Suvarnabhumi Airport

When to book flights from Ontario to Bangkok

Are your dates flexible? Find out the best times to travel from Ontario to Bangkok based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Ontario to Bangkok flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Ontario to Bangkok?

    Flights from Ontario to Bangkok usually depart from Ontario (ONT) and may arrive at several airports in Bangkok area, including Bangkok Suvarnabhumi (BKK) and Bangkok Don Mueang Intl (DMK).

  • What cabin classes can I book on flights from Ontario to Bangkok?

    Four cabin classes are available on flights from Ontario to Bangkok:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • Which airports do connecting flights from Ontario to Bangkok pass through?

    Most connecting flights from Ontario to Bangkok pass through Taipei City Taiwan Taoyuan Intl (TPE), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

  • Can I save money by using flexible dates for flights from Ontario to Bangkok?

    Yes. Being flexible with your travel dates can save you up to 24% on the Ontario to Bangkok route. Monday is the cheapest departure day at $783 round-trip on average, while Friday is the most expensive at $1,022, a difference of $239. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Bangkok?

    Some of the most popular sights in Bangkok are Pratunam, Terminal 21 and Phrom Phong BTS Skytrain Station. These are among the most viewed places in Bangkok on KAYAK.

  • How expensive are last-minute Ontario to Bangkok flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 2% above the route average of $860. Book 15 weeks before departure for the lowest fares.

  • How long is a flight from Ontario to Bangkok?

    A nonstop flight from Ontario to Bangkok takes 0h 00m, covering 8,285 miles.

  • Do I need a passport to fly from Ontario to Bangkok?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from Ontario to Bangkok looking right now?

    One-way fares from Ontario to Bangkok are currently lower than usual. Average one-way flight prices are about $432, which is 8% below the typical average for this route.

  • What is the time difference between Ontario and Bangkok?

    Bangkok is 14 hours ahead of Ontario (Indochina Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available in Bangkok?

    Since Bangkok is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Bangkok Suvarnabhumi Airport (BKK) — daily rates from around $13:

    · Drive Car Rental
    · Alamo
    · Sixt
    · Yesaway
    · Hertz

    Near Bangkok Don Mueang Intl Airport (DMK) — daily rates from around $7:

    · Drive Car Rental
    · Alamo
    · THAIRENTACAR
    · Enterprise Rent-A-Car
    · Chic Car Rent

  • How much should I expect to pay for a Ontario to Bangkok flight?

    Round-trip flights from Ontario to Bangkok range from $769 to $1,073, with an average of $860 over the past 12 months. Anything below $769 counts as a good deal.

Your guide to booking Ontario to Bangkok flights

Get tips on when to book, when to fly and what to know before your trip.

Everything you need to know for your flight from Ontario to Bangkok

Information on your arrival and departure airports

Ontario (ONT)