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Illinois

$445+ Cheap flights from Thailand to Illinois

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ORD
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
1 adult, Economy
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Cheap flight deals from Thailand to Illinois

Keep the following information in mind while searching for Thailand to Illinois flight deals. Data was last updated April 1, 2025.

Round-trip from

$990
(Korean Air)

One-way from

$445
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$1,123
From Thailand to Illinois
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One-way flight from Thailand to Illinois
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Highest demand for flights based on searches. 4% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Thailand to Illinois

Cheapest flights from Thailand to Illinois
Explore the most affordable flight options available from Thailand to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

This Korean Air deal was found by Cheapflights users on 4/1. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:15 amCNX - ORD
1 stop21h 15mKorean Air
Thu 1/1511:25 amORD - CNX
1 stop22h 40mKorean Air
Deal found 4/1$986
This Delta deal was found by Cheapflights users on 4/1. 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 4/711:15 pmCNX - ORD
2 stops36h 44mDelta
Wed 4/237:50 amORD - CNX
2 stops26h 05mDelta
Deal found 4/1$990
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Thu 4/179:35 amBKK - ORD
1 stop35h 05mUnited Airlines
Wed 5/76:00 amORD - BKK
2 stops29h 55mUnited Airlines
Deal found 3/31$1,030
This FlightHub deal was found by Cheapflights users on 4/1. 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 4/17:00 pmBKK - ORD
1 stop31h 25mCathay Pacific
Sat 4/264:00 pmORD - BKK
1 stop19h 50mCathay Pacific
Deal found 4/1$1,031
This Cathay Pacific deal was found by Cheapflights users on 4/1. 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.
Tue 4/17:00 pmBKK - ORD
2 stops23h 25mMultiple Airlines
Sat 4/264:00 pmORD - BKK
1 stop19h 50mMultiple Airlines
Deal found 4/1$1,044
This SWISS deal was found by Cheapflights users on 3/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1312:35 pmBKK - ORD
1 stop36h 10mSWISS
Sun 5/112:20 pmORD - BKK
1 stop31h 25mSWISS
Deal found 3/31$1,051
This Korean Air deal was found by Cheapflights users on 3/31. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1311:30 pmBKK - ORD
1 stop22h 00mKorean Air
Sat 11/1511:05 amORD - BKK
1 stop23h 15mKorean Air
Deal found 3/31$1,062
This Delta deal was found by Cheapflights users on 3/31. 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.
Sun 9/149:50 amBKK - ORD
2 stops24h 02mDelta
Sun 11/167:30 amORD - BKK
2 stops26h 50mDelta
Deal found 3/31$1,064
This EaseMyTrip deal was found by Cheapflights users on 4/1. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/232:40 amBKK - STL
2 stops47h 27mMultiple Airlines
Mon 8/117:32 pmSTL - BKK
2 stops28h 38mMultiple Airlines
Deal found 4/1$1,070
This Delta deal was found by Cheapflights users on 4/1. 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.
Thu 4/39:40 pmBKK - MDW
2 stops26h 55mDelta
Wed 4/169:20 amMDW - BKK
2 stops24h 25mDelta
Deal found 4/1$1,088
This Gurufare deal was found by Cheapflights users on 3/31. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/27:00 amBKK - ORD
1 stop19h 55mANA
Fri 5/212:45 pmORD - BKK
1 stop27h 50mANA
Deal found 3/31$1,091
This StudentUniverse deal was found by Cheapflights users on 3/31. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/38:25 amBKK - ORD
1 stop24h 35mThai Airways
Sun 7/612:30 amORD - BKK
1 stop28h 20mThai Airways
Deal found 3/31$1,111

Cheapflights Fare Finder

Customize your flight search to find flights from Thailand to Illinois 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 April 1, 2025.
Use the filters below to find and compare flights from Thailand to Illinois that are best for you.

Fly from

Thailand

Fly to

Illinois

Route

Depart

Return

Price

Chiang MaiChicago

CNX - ORD

CNXORD

Chiang Mai

Mon 9/8

11:15 pm-9:30 am

1 stop22h 15m

Chicago O'Hare Intl

Wed 10/29

12:05 pm-11:05 pm

1 stop23h 00m

$990

Chiang MaiChicago

CNX - ORD

CNXORD

Chiang Mai

Mon 9/8

11:15 pm-2:56 pm

2 stops51h 41m

Chicago O'Hare Intl

Wed 11/5

6:00 pm-11:05 pm

2 stops40h 05m

$991

BangkokChicago

BKK - ORD

BKKORD

Bangkok Suvarnabhumi

Thu 4/17

9:35 am-8:40 am

1 stop35h 05m

Chicago O'Hare Intl

Thu 5/8

6:00 am-11:55 pm

2 stops29h 55m

$1,030

BangkokChicago

BKK - ORD

BKKORD

Bangkok Suvarnabhumi

Mon 4/14

5:30 pm-2:25 pm

1 stop32h 55m

Chicago O'Hare Intl

Thu 4/17

4:00 pm-11:50 pm

1 stop19h 50m

$1,035

BangkokChicago

BKK - ORD

BKKORD

Bangkok Suvarnabhumi

Tue 6/10

8:05 am-9:01 pm

2 stops24h 56m

Chicago O'Hare Intl

Mon 7/7

4:00 pm-11:50 pm

1 stop19h 50m

$1,044

BangkokChicago

BKK - ORD

BKKORD

Bangkok Suvarnabhumi

Sun 4/13

12:35 pm-12:45 pm

1 stop36h 10m

Chicago O'Hare Intl

Sun 5/11

2:20 pm-9:45 am

1 stop31h 25m

$1,051

BangkokChicago

BKK - ORD

BKKORD

Bangkok Suvarnabhumi

Sat 9/13

11:30 pm-9:30 am

1 stop22h 00m

Chicago O'Hare Intl

Sat 11/15

11:05 am-11:20 pm

1 stop23h 15m

$1,062

BangkokChicago

BKK - ORD

BKKORD

Bangkok Suvarnabhumi

Sun 9/14

9:50 am-9:52 pm

2 stops24h 02m

Chicago O'Hare Intl

Wed 11/19

7:30 am-11:20 pm

2 stops26h 50m

$1,064

BangkokSt. Louis

BKK - STL

BKKSTL

Bangkok Suvarnabhumi

Fri 5/23

2:40 am-2:07 pm

2 stops47h 27m

Lambert-St Louis

Mon 8/11

7:32 pm-12:10 pm

2 stops28h 38m

$1,070

Chiang MaiChicago

CNX - ORD

CNXORD

Chiang Mai

Sun 9/7

11:20 am-5:40 am

2 stops30h 20m

Chicago O'Hare Intl

Wed 11/5

5:50 pm-10:25 am

2 stops27h 35m

$1,099

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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

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

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

Currently, August is the cheapest month in which you can book a flight from Thailand to Illinois (average of $245). Flying from Thailand to Illinois in March is currently the most expensive (average of $323). 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 TH to IL?

Find hourly flight availability from Thailand to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Thailand to Illinois as you normally would.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 1, 2025.
Read reviews from past customers who have flown EVA Air, Korean Air and Japan Airlines from Thailand to Illinois. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,170 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very good
1,052 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
ANA
8.3
Very good
830 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Asiana Airlines
8.2
Very good
440 reviews
EVA Air
8.4
Very good
1,170 reviews

Boarding

8.4

Crew

8.6

Food

8.1

Entertainment

8.0

Comfort

8.3

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

Related info for your journey

Find useful and relevant information for your journey from Thailand to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    The cheapest airlines for a one-way flight from Thailand to Illinois are Thai Airways ($589), IndiGo ($592), and Philippine Airlines ($612).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Thailand to Illinois 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 Thailand to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Thailand to Illinois (average of $245). Flying from Thailand to Illinois in March is currently the most expensive (average of $323). 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 Thailand to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Thailand to Illinois

Discover the top 8 airlines that operate flights from Thailand to Illinois. 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 April 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Cathay PacificCheapest$859Average$1,041FlexibilityNo cancel feeOn-time72%
Japan AirlinesCheapest$913Average$1,024FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$915Average$1,171FlexibilityNo cancel feeOn-time81%
ANACheapest$926Average$1,068FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$939Average$1,050FlexibilityNo cancel feeOn-time69%
EVA AirCheapest$940Average$1,068FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$956Average$1,120FlexibilityNo cancel feeOn-time71%
Thai AirwaysCheapest$994Average$1,155FlexibilityNo cancel feeOn-time77%

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