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$377+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BKK
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
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 March 15, 2026.

This FlightHub deal was found by Cheapflights users on 3/12. 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.
Wed 9/301:10 pm
ORD
-
HKT
1 stop42h 35m
Air India
Tue 10/68:45 pm
HKT
-
ORD
2 stops26h 25m
Air India
Deal found 3/12$671
This IEagle deal was found by Cheapflights users on 3/11. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/111:10 pm
ORD
-
HKT
1 stop30h 15m
Air India
Sun 10/188:25 am
HKT
-
ORD
2 stops38h 45m
Air India
Deal found 3/11$673
This FlightHub deal was found by Cheapflights users on 3/12. 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.
Wed 9/301:10 pm
ORD
-
HKT
1 stop42h 35m
Air India
Sun 10/48:45 pm
HKT
-
ORD
2 stops26h 25m
Air India
Deal found 3/12$675
This FlightHub deal was found by Cheapflights users on 3/12. 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.
Fri 10/21:10 pm
ORD
-
HKT
1 stop30h 15m
Air India
Tue 10/68:45 pm
HKT
-
ORD
2 stops26h 25m
Air India
Deal found 3/12$677
This FlightHub deal was found by Cheapflights users on 3/13. 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.
Mon 11/22:30 pm
ORD
-
HKT
1 stop28h 35m
Air India
Sun 11/158:30 pm
HKT
-
ORD
2 stops28h 00m
Air India
Deal found 3/13$703
This FlightHub deal was found by Cheapflights users on 3/14. 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.
Sun 11/152:30 pm
ORD
-
HKT
1 stop28h 35m
Air India
Sun 11/229:10 am
HKT
-
ORD
2 stops39h 20m
Air India
Deal found 3/14$706
This FlightHub deal was found by Cheapflights users on 3/14. 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.
Fri 11/132:30 pm
ORD
-
HKT
1 stop40h 00m
Air India
Sun 11/229:10 am
HKT
-
ORD
2 stops39h 20m
Air India
Deal found 3/14$710
This oojo deal was found by Cheapflights users on 3/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:30 pm
ORD
-
HKT
1 stop40h 00m
Air India
Sun 12/138:30 pm
HKT
-
ORD
2 stops28h 00m
Air India
Deal found 3/11$713
This FlightHub deal was found by Cheapflights users on 3/11. 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.
Mon 11/232:30 pm
ORD
-
HKT
1 stop28h 35m
Air India
Sun 11/299:10 am
HKT
-
ORD
2 stops39h 20m
Air India
Deal found 3/11$726
This FlightHub deal was found by Cheapflights users on 3/14. 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.
Sun 11/152:30 pm
ORD
-
HKT
1 stop28h 35m
Air India
Sat 11/218:30 pm
HKT
-
ORD
2 stops28h 00m
Air India
Deal found 3/14$742
This FlightHub deal was found by Cheapflights users on 3/14. 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.
Fri 11/132:30 pm
ORD
-
HKT
1 stop40h 00m
Air India
Sat 11/218:30 pm
HKT
-
ORD
2 stops28h 00m
Air India
Deal found 3/14$746
This oojo deal was found by Cheapflights users on 3/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/141:10 pm
ORD
-
BKK
1 stop39h 45m
Air India
Sun 8/305:55 pm
BKK
-
ORD
2 stops29h 15m
Air India
Deal found 3/11$805

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 March 15, 2026.

Round-trip from

$779
(IEagle)

One-way from

$377
(IEagle)

Popular in

December

Cheapest in

September

Average price

$886
From Illinois to Thailand
Search Deals
One-way flight from Illinois to Thailand
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 15, 2026.
Use the filters below to find and compare flights from Illinois to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 5/18

7:12 am-11:35 pm

2 stops28h 23m

Bangkok Suvarnabhumi

Tue 5/26

9:40 pm-4:55 pm

2 stops31h 15m

$829

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 5/4

8:15 am-11:35 pm

2 stops27h 20m

Bangkok Suvarnabhumi

Tue 5/12

11:30 pm-9:53 pm

2 stops34h 23m

$830

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 8/25

12:30 pm-9:45 pm

1 stop21h 15m

Bangkok Suvarnabhumi

Mon 10/5

11:30 pm-2:13 pm

2 stops26h 43m

$838

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Sun 9/6

9:30 am-1:05 am

2 stops27h 35m

Bangkok Suvarnabhumi

Mon 9/14

2:35 am-9:46 pm

2 stops31h 11m

$842

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Fri 5/15

6:23 am-11:35 pm

2 stops29h 12m

Bangkok Suvarnabhumi

Wed 5/20

9:40 pm-4:12 pm

2 stops30h 32m

$879

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 5/11

6:00 am-11:35 pm

2 stops29h 35m

Bangkok Suvarnabhumi

Thu 5/21

9:40 pm-4:55 pm

2 stops31h 15m

$880

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Wed 5/6

5:15 am-11:35 pm

2 stops30h 20m

Bangkok Suvarnabhumi

Fri 5/22

9:40 pm-6:41 pm

2 stops33h 01m

$880

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 4/21

2:35 pm-9:35 am

3 stops31h 00m

Bangkok Suvarnabhumi

Wed 5/20

9:35 am-5:03 am

2 stops31h 28m

$888

ChicagoPhuket City

ORD - HKT

ORDHKT

Chicago O'Hare Intl

Fri 4/17

1:10 pm-7:25 am

1 stop30h 15m

Phuket City

Thu 4/23

8:25 am-11:10 am

1 stop38h 45m

$905

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Wed 4/15

1:10 pm-7:40 am

1 stop30h 30m

Bangkok Suvarnabhumi

Sat 4/25

5:55 pm-11:10 am

1 stop29h 15m

$914

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $830). 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 March 15, 2026.

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 in the morning, which can drop the price by up to 30% 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 March 30, 2025.

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?

    Delta, Air India, and Etihad Airways can get you from Illinois to Thailand in just under 28h 23m. Your travel time can differ by up to 1h 52m. 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 $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 $830). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$551Average$970FlexibilityNo cancel feeOn-time81%
Air IndiaCheapest$606Average$871FlexibilityNo cancel feeOn-timeN/A
Cathay PacificCheapest$666Average$1,139FlexibilityNo cancel feeOn-time72%
ANACheapest$681Average$1,069FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$706Average$1,147FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$710Average$1,046FlexibilityNo cancel feeOn-time77%
Etihad AirwaysCheapest$744Average$1,066FlexibilityNo cancel feeOn-time75%
DeltaCheapest$745Average$1,235FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$779Average$1,063FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$809Average$1,215FlexibilityNo cancel feeOn-time74%

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