Cheap flights from Chicago to Bangkok from $459 MDW, ORD, RFD → BKK, DMK
Chicago Midway International Airport (MDW), O'Hare International Airport (ORD), Chicago Rockford International Airport (RFD) → Suvarnabhumi Airport (BKK), Don Mueang International Airport (DMK)
The cheapest return found recently is $846 with Philippine Airlines, 1 Sept 2027 – 19 Sept 2027, found 2 days ago. The cheapest one-way found recently is $459 with Korean Air, 11 Mar 2027, found 5 days ago.
- Cheapest one-way found recently
- $459, found 5 days ago
- Cheapest return found recently
- $846, 1 Sept 2027 to 19 Sept 2027
- Usual return price
- $916 to $1,071
- Cheapest month to fly
- January 2027, return fares from $621 found in the last 7 days
Return
The cheapest return fare on each of 15 departure dates is usually $916 to $1,071.
Cheapest return found recently
$846
1 Sept 2027 – 19 Sept 2027 · Philippine Airlines
O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK)
Leaves 11:45 p.m. · Return leaves 11:30 a.m. · 58 h 15 min of travel, both ways together
out 1 stop, back 2 stops · via Ninoy Aquino International Airport (MNL), Los Angeles International Airport (LAX) · overnight connection · 12 h connection
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$846 1 Sept 2027 – 19 Sept 2027found 2 days agoSee prices for these dates
$621 22 Jan 2027 – 30 Jan 2027found 3 days agoSee prices for these dates
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $523 to $967.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 15 departure dates from 24 Dec to 1 Sept 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 18-night return fares leaving within 3 days of 1 Sept 2027 to compare.
Every date we hold
212 fares on 15 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 24 Dec – 8 Jan 2027 | $1,364 | American Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 2 stops, back 1 stop | found 6 days ago | See prices for these dates |
| 22 Jan 2027 – 30 Jan 2027 | $621 | Cathay Pacific | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 5 Mar 2027 – 26 Mar 2027 | $941 | Korean Air | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 23 Mar 2027 – 4 Apr 2027 | $891 | Cathay Pacific | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 24 Mar 2027 – 4 Apr 2027 | $853 | Philippine Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 10 Apr 2027 – 30 Apr 2027 | $947 | Korean Air | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 28 May 2027 – 7 Jun 2027 | $956 | Philippine Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 8 Jun 2027 – 8 Jul 2027 | $1,071 | American Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 2 stops, back 2 stops | found 2 days ago | See prices for these dates |
| 9 Jun 2027 – 8 Jul 2027 | $989 | Philippine Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 10 Jun 2027 – 8 Jul 2027 | $1,146 | Cathay Pacific | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 15 Jun 2027 – 24 Jun 2027 | $1,096 | Cathay Pacific | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 17 Jun 2027 – 29 Jun 2027 | $1,069 | American Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 2 stops, back 1 stop | found 4 days ago | See prices for these dates |
| 21 Jun 2027 – 9 Jul 2027 | $1,026 | Philippine Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 2 Jul 2027 – 11 Jul 2027 | $1,071 | Philippine Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 1 Sept 2027 – 17 Sept 2027 | $787 | Philippine Airlines | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $621.
Airlines on the cheapest dates: Philippine Airlines, Cathay Pacific, American Airlines, Korean Air.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$459
11 Mar 2027 · Korean Air
O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK)
Leaves 11:10 a.m. · 22 h 55 min trip
1 stop
found 5 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$459 11 Mar 2027found 5 days agoOpen this trip
$436 10 Feb 2027found 7 days agoOpen this trip
What have prices looked like?
Over 35 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $387 to $702.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 11 Mar 2027 to compare.
Every date we hold
19 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 10 Feb 2027 | $436 | Etihad Airways | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | 1 stop | found 7 days ago | Open this trip |
| 11 Mar 2027 | $459 | Korean Air | O'Hare International Airport (ORD) → Suvarnabhumi Airport (BKK) | 1 stop | found 5 days ago | Open this trip |
Which month looks cheapest?
February 2027 is the cheapest month — from $436.
Airlines on the cheapest dates: Etihad Airways, Korean Air.
Premium cabin fares from Chicago to Bangkok
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 1 Sept 2027 – 19 Sept 2027 in another cabin: Premium economy · Business · First
Today's prices for 11 Mar 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Chicago to Bangkok?
Return
The cheapest fares were 90 to 179 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $891 | $853 | +3% | 8 |
| 14–29 days | $960 | $753 | +11% | 30 |
| 30–59 days | $985 | $918 | +14% | 40 |
| 60–89 days | $987 | $621 | +14% | 48 |
| 90–179 days | $864 | $832 | Cheapest seen | 49 |
| 180+ days | $1,054 | $787 | +22% | 49 |
One-way
Not enough history yet: in 35 days of one-way prices, 24 Sept to 11 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Live price for these dates
The cheapest return found recently is for 1 Sept 2027 – 19 Sept 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Chicago to Bangkok?
The cheapest return found recently is $846 with Philippine Airlines, 1 Sept 2027 to 19 Sept 2027, found 2 days ago. The cheapest return we hold, of any age, is $621 with Cathay Pacific, 22 Jan 2027 to 30 Jan 2027, found 3 days ago. The cheapest return fare on each of 15 departure dates is usually $916 to $1,071.
How much is a one-way flight from Chicago to Bangkok?
The cheapest one-way found recently is $459 with Korean Air, 11 Mar 2027, found 5 days ago. The cheapest one-way we hold, of any age, is $436 with Etihad Airways, 10 Feb 2027, found 7 days ago.
What is the cheapest month to fly from Chicago to Bangkok?
January 2027 is the cheapest month for a return, from $621, 22 Jan 2027 to 30 Jan 2027, found 3 days ago. February 2027 is the cheapest month for a one-way, from $436, 10 Feb 2027, found 7 days ago.
How far ahead should I book a flight from Chicago to Bangkok?
In 49 days of prices between 24 Sept and 11 Nov, return fares were cheapest 90 to 179 days before departure.
How long is the flight from Chicago to Bangkok?
The cheapest one-way found recently, with Korean Air on 11 Mar 2027, takes 22 h 55 min with 1 stop.
Which airlines have the cheapest flights from Chicago to Bangkok?
Between 24 Dec and 1 Sept 2027, Philippine Airlines has the cheapest return on 6 of the 15 departure dates we hold, Cathay Pacific on 4 and American Airlines on 3.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work