Baltimore to Chicago BWI → MDW, ORD, RFD
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Chicago Midway International Airport (MDW), O'Hare International Airport (ORD), Chicago Rockford International Airport (RFD)
The cheapest return found recently is $240 with Frontier Airlines, 4 Nov – 7 Nov, found 2 days ago. The cheapest one-way found recently is $117 with Frontier Airlines, 25 Nov, found 3 days ago.
Return
The cheapest return fare on each of 17 departure dates is usually $289 to $368.
Cheapest return found recently
$240
4 Nov – 7 Nov · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Chicago Midway International Airport (MDW)
Leaves 10:45 a.m. · Return leaves 7:05 a.m. · 17 h 9 min of travel, both ways together
out 1 stop, back 1 stop
found 2 days ago
Cheapest nonstop return
$305
25 Mar 2027 – 28 Mar 2027 · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD)
Leaves 5:12 p.m. · Return leaves 1:10 p.m. · 4 h 31 min of travel, both ways together
out nonstop, back nonstop
found 3 days ago
Found recently, and the cheapest we hold
$240 4 Nov – 7 Novfound 2 days agoSee prices for these dates
$175 8 Dec – 13 Decfound 4 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $89 to $252.
25 days is a short history, so treat this range as an early guide.
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 17 departure dates from 25 Oct to 25 Mar 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?
No. We hold 3-night return fares on 1 other departure date within 3 days of 4 Nov, and it is not cheaper.
Every date we hold
27 fares on 17 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 Oct – 26 Oct | $364 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 26 Oct – 27 Oct | $342 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back 1 stop | found 2 days ago | See prices for these dates |
| 31 Oct – 3 Nov | $263 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Chicago Rockford International Airport (RFD) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 1 Nov – 2 Nov | $231 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 4 Nov – 7 Nov | $240 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Chicago Midway International Airport (MDW) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 26 Nov – 29 Nov | $289 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back 1 stop | found 5 days ago | See prices for these dates |
| 27 Nov – 29 Nov | $314 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back 2 stops | found 5 days ago | See prices for these dates |
| 29 Nov – 29 Nov | $412 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Chicago Midway International Airport (MDW) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 8 Dec – 13 Dec | $175 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 18 Mar 2027 – 23 Mar 2027 | $340 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 19 Mar 2027 – 23 Mar 2027 | $429 | United Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 20 Mar 2027 – 25 Mar 2027 | $366 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out 1 stop, back nonstop | found 3 days ago | See prices for these dates |
| 21 Mar 2027 – 24 Mar 2027 | $374 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 22 Mar 2027 – 25 Mar 2027 | $364 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out 1 stop, back nonstop | found 3 days ago | See prices for these dates |
| 23 Mar 2027 – 28 Mar 2027 | $368 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out 1 stop, back nonstop | found 3 days ago | See prices for these dates |
| 24 Mar 2027 – 29 Mar 2027 | $389 | United Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 25 Mar 2027 – 28 Mar 2027 | $305 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $175.
Airlines on the cheapest dates: Frontier Airlines, United Airlines.
One-way
The cheapest one-way fare on each of 6 departure dates is usually $95 to $182.
Cheapest one-way found recently
$117
25 Nov · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD)
Leaves 2:29 p.m. · 2 h 28 min trip
nonstop
found 3 days ago
Cheapest nonstop one-way
$117
25 Nov · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD)
Leaves 2:29 p.m. · 2 h 28 min trip
nonstop
found 3 days ago
Found recently, and the cheapest we hold
$117 25 Novfound 3 days agoOpen this trip
$71 5 Decfound 6 days agoOpen this trip
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $46 to $123.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 6 departure dates from 2 Nov to 16 Jun 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 one-way fares leaving within 3 days of 25 Nov to compare.
Every date we hold
6 fares on 6 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 2 Nov | $88 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | nonstop | found 6 days ago | Open this trip |
| 25 Nov | $117 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | nonstop | found 3 days ago | Open this trip |
| 29 Nov | $205 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | 1 stop | found 3 days ago | Open this trip |
| 30 Nov | $129 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | nonstop | found 3 days ago | Open this trip |
| 5 Dec | $71 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | 1 stop | found 6 days ago | Open this trip |
| 16 Jun 2027 | $199 | United Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → O'Hare International Airport (ORD) | nonstop | found 4 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $71.
Airlines on the cheapest dates: Frontier Airlines, United Airlines.
Premium cabin fares from Baltimore to Chicago
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 4 Nov – 7 Nov in another cabin: Premium economy · Business · First
Today's prices for 25 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Baltimore to Chicago?
Return
Fares 14 to 29 days before departure were typically 47% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 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 | $351 | $231 | +90% | 21 |
| 7–13 days | $275 | $231 | +48% | 14 |
| 14–29 days | $185 | $89 | Cheapest seen | 25 |
| 30–59 days | $207 | $175 | +12% | 15 |
| 60–89 days | $261 | $242 | +41% | 11 |
| 90–179 days | $298 | $291 | +61% | 16 |
| 180+ days | $371 | $241 | +101% | 16 |
One-way
Fares 30 to 59 days before departure were typically 68% lower than 0 to 6 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (25 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 | $162 | $150 | +212% | 9 |
| 14–29 days | $88 | $46 | +69% | 23 |
| 30–59 days | $52 | $52 | Cheapest seen | 12 |
| 60–89 days | $123 | $102 | +137% | 11 |
| 90–179 days | $160 | $115 | +208% | 22 |
| 180+ days | $181 | $179 | +248% | 25 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Philadelphia → Chicago
145 km from Baltimore
$255
$15 more than flying from Baltimore
1 Nov – 6 Nov · PHL → ORD · out 1 stop, back nonstop
found today
Washington → Chicago
57 km from Baltimore
$229
$11 less than flying from Baltimore
4 Nov – 7 Nov · IAD → MDW · out 1 stop, back 1 stop
found 2 days ago
Wilmington → Chicago
105 km from Baltimore
$761
$521 more than flying from Baltimore
1 Nov – 5 Nov · ILG → ORD · out 2 stops, back 2 stops
found 3 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Washington → Chicago
57 km from Baltimore
$114
$3 less than flying from Baltimore
25 Nov · DCA → ORD · 1 stop
found 3 days ago
Philadelphia → Chicago
145 km from Baltimore
$135
$18 more than flying from Baltimore
31 Oct · PHL → ORD · 1 stop
found 4 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 4 Nov – 7 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
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