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$351+ Cheap flights from Illinois to Thailand

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BKK
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Illinois to Thailand

Cheapest flights from Illinois to Thailand
Explore the most affordable flight options available from Illinois to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Ovago deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:35 pmORD - BKK
1 stop38h 40mCathay Pacific
Wed 2/47:55 amBKK - ORD
1 stop18h 00mCathay Pacific
Deal found 12/27$934
This Ovago deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:35 pmORD - BKK
1 stop36h 20mCathay Pacific
Thu 2/57:55 amBKK - ORD
1 stop18h 00mCathay Pacific
Deal found 12/26$937
This Ovago deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:35 pmORD - BKK
1 stop31h 40mCathay Pacific
Wed 2/47:55 amBKK - ORD
1 stop18h 00mCathay Pacific
Deal found 12/27$960
This KAYAK deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:35 pmORD - BKK
1 stop20h 40mCathay Pacific
Wed 2/47:55 amBKK - ORD
1 stop18h 00mCathay Pacific
Deal found 12/27$965
This Ovago deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/282:35 pmORD - BKK
1 stop36h 20mCathay Pacific
Sun 1/251:05 pmBKK - ORD
1 stop36h 50mCathay Pacific
Deal found 12/27$984
This Cathay Pacific deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:35 pmORD - BKK
1 stop32h 30mCathay Pacific
Thu 4/307:00 pmBKK - ORD
1 stop31h 25mCathay Pacific
Deal found 12/26$1,069
This Kiwi.com deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:30 pmORD - BKK
1 stop29h 20mAir India
Thu 2/53:10 pmBKK - ORD
2 stops33h 20mAir India
Deal found 12/26$1,111
This Cathay Pacific deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:35 pmORD - BKK
1 stop34h 30mCathay Pacific
Wed 1/214:55 pmBKK - ORD
1 stop33h 00mCathay Pacific
Deal found 12/26$1,169
This Ovago deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/272:35 pmORD - BKK
1 stop37h 05mCathay Pacific
Sat 1/317:15 pmBKK - ORD
1 stop30h 40mCathay Pacific
Deal found 12/26$1,189
This Delta deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amORD - BKK
2 stops29h 45mDelta
Mon 1/122:05 amBKK - ORD
2 stops34h 48mDelta
Deal found 12/27$1,209
This Delta deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:59 pmORD - BKK
2 stops38h 21mDelta
Mon 1/122:05 amBKK - ORD
2 stops34h 48mDelta
Deal found 12/27$1,244
This Kiwi.com deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:30 pmORD - DMK
1 stop24h 00mMultiple Airlines
Thu 2/54:50 pmDMK - ORD
2 stops31h 40mMultiple Airlines
Deal found 12/26$1,261

Find flight deals from Illinois to Thailand

Keep the following information in mind while searching for Illinois to Thailand flight deals. Data was last updated December 28, 2025.

Round-trip from

$673
(oojo)

One-way from

$351
(oojo)

Popular in

June

Cheapest in

September

Average price

$1,341
From Illinois to Thailand
Search Deals
One-way flight from Illinois to Thailand
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($193 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Thailand that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Illinois to Thailand that are best for you.

Fly from

Illinois

Fly to

Thailand

Route

Depart

Return

Price

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Sun 3/8

9:15 pm-12:20 am

2 stops39h 05m

Bangkok Suvarnabhumi

Tue 5/26

9:35 am-11:20 pm

2 stops25h 45m

$815

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 3/10

8:50 am-5:10 am

2 stops32h 20m

Bangkok Suvarnabhumi

Thu 5/28

7:00 am-8:22 pm

2 stops25h 22m

$815

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Wed 3/11

6:17 am-12:20 am

2 stops30h 03m

Bangkok Suvarnabhumi

Tue 5/26

9:35 am-11:20 pm

2 stops25h 45m

$815

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 1/27

2:40 pm-11:25 am

2 stops31h 45m

Bangkok Suvarnabhumi

Tue 3/3

4:55 pm-3:10 pm

2 stops35h 15m

$819

ChicagoChiang Mai

ORD - CNX

ORDCNX

Chicago O'Hare Intl

Tue 3/3

11:30 pm-10:35 am

1 stop22h 05m

Chiang Mai

Tue 5/19

11:35 am-9:00 pm

1 stop21h 25m

$822

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 3/23

2:35 pm-11:25 am

2 stops32h 50m

Bangkok Suvarnabhumi

Tue 4/14

3:40 pm-7:26 am

3 stops27h 46m

$827

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 1/20

6:30 pm-11:25 am

2 stops27h 55m

Bangkok Suvarnabhumi

Tue 3/3

4:55 pm-5:12 am

2 stops25h 17m

$831

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Mon 3/2

2:35 pm-11:20 am

1 stop31h 45m

Phuket City

Mon 3/16

6:35 pm-1:55 pm

1 stop31h 20m

$837

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Sun 3/15

9:20 pm-7:25 am

1 stop22h 05m

Phuket City

Sat 3/21

8:35 am-11:05 am

1 stop38h 30m

$886

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Sun 3/8

6:04 am-7:30 pm

2 stops25h 26m

Phuket City

Sun 3/15

9:10 am-12:30 pm

2 stops39h 20m

$889

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Thailand

Have a flexible travel schedule? Discover the best time to fly to Thailand from Illinois 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 Illinois to Thailand

What is the cheapest month to book a flight from Illinois to Thailand?

Currently, August is the cheapest month in which you can book a flight from Illinois to Thailand (average of $642). Flying from Illinois to Thailand in June is currently the most expensive (average of $894). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to TH?

Find hourly flight availability from Illinois to Thailand. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 28, 2025.

When flying from Illinois to Thailand, 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 27% versus a flight in the afternoon.

What is the cheapest day to fly from Illinois to Thailand?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Thailand. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Thailand flight should consider departing on Friday afternoons when fares are most often at their lowest. Monday evenings 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 Illinois to Thailand. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Thailand?

    United Airlines, EVA Air, and Cathay Pacific can get you from Illinois to Thailand in just under 22h 05m. Your travel time can differ by up to 17h. Illinois and Thailand are separated by a distance of 8211 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Illinois to Thailand one-way?

    The cheapest airline one-way is Air India, with whom users have recently found tickets for as low as $308. However, be on the lookout for offers from Turkish Airlines and Cathay Pacific, as they are both options that can get you from Illinois to Thailand for a low price.

  • Can I find deals for flights from Illinois to Thailand that include hotel bookings?

    Yes. In addition to deals on Illinois to Thailand flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Thailand?

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

  • Can I find deals for business class flights from Illinois to Thailand?

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

  • What is the cheapest month to book a flight from Illinois to Thailand?

    Currently, August is the cheapest month in which you can book a flight from Illinois to Thailand (average of $642). Flying from Illinois to Thailand in June is currently the most expensive (average of $894). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Illinois to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Thailand

Discover the top 10 airlines that operate flights from Illinois to Thailand. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air IndiaCheapest$606Average$912FlexibilityNo cancel feeOn-timeN/A
Cathay PacificCheapest$669Average$1,062FlexibilityNo cancel feeOn-time72%
ANACheapest$681Average$863FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$698Average$1,086FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$707Average$892FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$714Average$1,003FlexibilityNo cancel feeOn-time77%
DeltaCheapest$745Average$1,206FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$779Average$1,063FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$825Average$977FlexibilityNo cancel feeOn-time79%
Etihad AirwaysCheapest$832Average$1,125FlexibilityNo cancel feeOn-time75%

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