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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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BKK
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Cheap flight deals from Illinois to Thailand

Keep the following information in mind while searching for Illinois to Thailand flight deals. Data was last updated November 26, 2025.

Round-trip from

$562
(oojo)

One-way from

$351
(oojo)

Popular in

June

Cheapest in

September

Average price

$880
From Illinois to Thailand
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One-way flight from Illinois to Thailand
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Highest demand for flights based on searches. 16% potential increase in price ($200 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 26, 2025.

This lol.travel deal was found by Cheapflights users on 11/24. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/272:35 pmORD - HKT
1 stop31h 45mCathay Pacific
Wed 12/1012:20 pmHKT - ORD
1 stop37h 35mCathay Pacific
Deal found 11/24$809
This United Airlines deal was found by Cheapflights users on 11/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:42 amORD - BKK
2 stops35h 43mUnited Airlines
Thu 12/114:55 pmBKK - ORD
2 stops26h 24mUnited Airlines
Deal found 11/25$818
This United Airlines deal was found by Cheapflights users on 11/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:42 amORD - BKK
2 stops35h 43mUnited Airlines
Mon 12/84:55 pmBKK - ORD
2 stops32h 15mUnited Airlines
Deal found 11/24$822
This United Airlines deal was found by Cheapflights users on 11/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/239:07 pmORD - BKK
2 stops43h 03mUnited Airlines
Thu 12/44:55 pmBKK - ORD
3 stops39h 49mUnited Airlines
Deal found 11/23$826
This Orbitz deal was found by Cheapflights users on 11/24. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/251:10 pmORD - BKK
1 stop28h 20mANA
Tue 12/22:20 pmBKK - ORD
1 stop37h 50mANA
Deal found 11/24$828
This FlightHub deal was found by Cheapflights users on 11/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/251:10 pmORD - BKK
1 stop28h 20mANA
Tue 12/2310:25 pmBKK - ORD
1 stop21h 55mANA
Deal found 11/25$829
This Ovago deal was found by Cheapflights users on 11/24. 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 11/252:35 pmORD - BKK
1 stop31h 05mCathay Pacific
Tue 3/317:00 pmBKK - ORD
1 stop31h 25mCathay Pacific
Deal found 11/24$836
This Ovago deal was found by Cheapflights users on 11/25. 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 11/262:35 pmORD - HKT
1 stop38h 00mCathay Pacific
Wed 12/36:35 pmHKT - ORD
1 stop31h 20mCathay Pacific
Deal found 11/25$836
This CheapOair deal was found by Cheapflights users on 11/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/271:10 pmORD - BKK
1 stop38h 10mANA
Sun 12/72:20 pmBKK - ORD
2 stops37h 05mANA
Deal found 11/25$838
This United Airlines deal was found by Cheapflights users on 11/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/254:40 pmORD - BKK
2 stops29h 45mUnited Airlines
Wed 12/104:55 pmBKK - ORD
2 stops26h 24mUnited Airlines
Deal found 11/24$845
This United Airlines deal was found by Cheapflights users on 11/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:18 pmORD - BKK
2 stops49h 07mUnited Airlines
Wed 12/34:55 pmBKK - ORD
2 stops26h 24mUnited Airlines
Deal found 11/25$853
This Orbitz deal was found by Cheapflights users on 11/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/284:25 pmORD - HKT
2 stops28h 10mMultiple Airlines
Mon 12/83:00 pmHKT - ORD
2 stops29h 20mMultiple Airlines
Deal found 11/25$921

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 November 26, 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

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Mon 2/23

1:30 pm-7:30 pm

1 stop41h 00m

Phuket City

Sat 2/28

9:10 am-11:30 am

2 stops39h 20m

$650

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Wed 1/14

2:35 pm-11:20 am

1 stop31h 45m

Phuket City

Wed 1/28

12:20 pm-12:55 pm

1 stop37h 35m

$738

ChicagoChiang Mai

ORD - CNX

ORDCNX

Chicago O'Hare Intl

Wed 1/21

2:35 pm-6:50 pm

1 stop39h 15m

Chiang Mai

Wed 2/4

10:35 am-12:55 pm

1 stop39h 20m

$738

ChicagoChiang Mai

ORD - CNX

ORDCNX

Chicago O'Hare Intl

Wed 2/18

2:35 pm-6:50 pm

1 stop39h 15m

Chiang Mai

Wed 3/11

7:40 pm-1:55 pm

1 stop30h 15m

$738

ChicagoChiang Mai

ORD - CNX

ORDCNX

Chicago O'Hare Intl

Thu 3/12

3:35 pm-6:50 pm

1 stop39h 15m

Chiang Mai

Wed 3/18

10:35 am-1:55 pm

1 stop39h 20m

$738

ChicagoChiang Mai

ORD - CNX

ORDCNX

Chicago O'Hare Intl

Mon 1/26

2:35 pm-9:50 am

1 stop30h 15m

Chiang Mai

Wed 2/4

10:35 am-12:55 pm

1 stop39h 20m

$738

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Sun 5/10

4:00 pm-10:50 am

1 stop30h 50m

Phuket City

Sun 5/17

6:20 pm-2:25 pm

1 stop32h 05m

$788

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 2/16

10:30 am-12:20 am

1 stop24h 50m

Bangkok Suvarnabhumi

Wed 3/4

4:55 pm-5:01 am

2 stops25h 06m

$820

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Thu 1/29

2:40 pm-11:25 am

2 stops31h 45m

Bangkok Suvarnabhumi

Wed 2/11

4:55 pm-6:17 am

2 stops26h 22m

$822

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 1/20

6:30 pm-11:25 am

2 stops27h 55m

Bangkok Suvarnabhumi

Tue 1/27

4:55 pm-6:30 am

2 stops26h 35m

$822

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/23

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 $872). 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 November 26, 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?

    Air India, Cathay Pacific, and United Airlines can get you from Illinois to Thailand in just under 24h 50m. Your travel time can differ by up to 16h 10m. Illinois and Thailand are separated by a distance of 8545 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 $351. However, be on the lookout for offers from Etihad Airways and IndiGo, 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 $872). 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air IndiaCheapest$606Average$917FlexibilityNo cancel feeOn-timeN/A
Cathay PacificCheapest$673Average$1,056FlexibilityNo cancel feeOn-time72%
ANACheapest$681Average$867FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$698Average$1,079FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$707Average$889FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$733Average$964FlexibilityNo cancel feeOn-time77%
IndiGoCheapest$735Average$1,260FlexibilityNo cancel feeOn-time80%
DeltaCheapest$745Average$1,236FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$793Average$1,291FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$825Average$980FlexibilityNo cancel feeOn-time79%

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