Chicago to Denver MDW, ORD, RFD → DEN
Chicago Midway International Airport (MDW), O'Hare International Airport (ORD), Chicago Rockford International Airport (RFD) → Denver International Airport (DEN)
The cheapest return found recently is $195 with Frontier Airlines, 26 Jan 2027 – 30 Jan 2027, found yesterday. The cheapest one-way found recently is $52 with Frontier Airlines, 16 Dec, found today.
Return
The cheapest return fare on each of 8 departure dates is usually $194 to $257.
Cheapest return found recently
$195
26 Jan 2027 – 30 Jan 2027 · Frontier Airlines
O'Hare International Airport (ORD) → Denver International Airport (DEN)
Leaves 6:21 a.m. · Return leaves 8:59 p.m. · 5 h 27 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Cheapest nonstop return
$195
26 Jan 2027 – 30 Jan 2027 · Frontier Airlines
O'Hare International Airport (ORD) → Denver International Airport (DEN)
Leaves 6:21 a.m. · Return leaves 8:59 p.m. · 5 h 27 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$195 26 Jan 2027 – 30 Jan 2027found yesterdaySee prices for these dates
$182 24 Jan 2027 – 29 Jan 2027found 3 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 $77 to $167.
At $195, the cheapest return found recently is above that range.
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 8 departure dates from 30 Oct to 5 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?
We hold no other 4-night return fares leaving within 3 days of 26 Jan 2027 to compare.
Every date we hold
18 fares on 8 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 30 Oct – 4 Nov | $200 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 31 Oct – 1 Nov | $272 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found 2 days ago | See prices for these dates |
| 20 Nov – 20 Nov | $252 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back 1 stop | found today | See prices for these dates |
| 24 Nov – 28 Nov | $238 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found 5 days ago | See prices for these dates |
| 13 Dec – 10 Jan 2027 | $189 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 24 Jan 2027 – 29 Jan 2027 | $182 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 26 Jan 2027 – 30 Jan 2027 | $195 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 5 Mar 2027 – 14 Mar 2027 | $273 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $182.
Airlines on the cheapest dates: Frontier Airlines.
One-way
The cheapest one-way fare on each of 5 departure dates is usually $72 to $111.
Cheapest one-way found recently
$52
16 Dec · Frontier Airlines
O'Hare International Airport (ORD) → Denver International Airport (DEN)
Leaves 7:25 a.m. · 3 h 4 min trip
nonstop
found today
Cheapest nonstop one-way
$52
16 Dec · Frontier Airlines
O'Hare International Airport (ORD) → Denver International Airport (DEN)
Leaves 7:25 a.m. · 3 h 4 min trip
nonstop
found today
Found recently, and the cheapest we hold
$52 16 Decfound todayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 24 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $46 to $149.
24 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 5 departure dates from 19 Nov to 26 Jan 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 16 Dec to compare.
Every date we hold
13 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 19 Nov | $111 | Southwest Airlines | Chicago Midway International Airport (MDW) → Denver International Airport (DEN) | nonstop | found today | Open this trip |
| 20 Nov | $117 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | nonstop | found today | Open this trip |
| 5 Dec | $72 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | nonstop | found 4 days ago | Open this trip |
| 16 Dec | $52 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | nonstop | found today | Open this trip |
| 26 Jan 2027 | $80 | Frontier Airlines | O'Hare International Airport (ORD) → Denver International Airport (DEN) | nonstop | found 4 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $52.
Airlines on the cheapest dates: Frontier Airlines, Southwest Airlines.
Premium cabin fares from Chicago to Denver
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 26 Jan 2027 – 30 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 16 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Chicago to Denver?
Return
Fares 14 to 29 days before departure were typically 71% 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 | $484 | $346 | +243% | 8 |
| 7–13 days | $315 | $77 | +123% | 9 |
| 14–29 days | $141 | $77 | Cheapest seen | 20 |
| 30–59 days | $155 | $141 | +10% | 22 |
| 60–89 days | $300 | $189 | +113% | 19 |
| 90–179 days | $162 | $160 | +15% | 14 |
One-way
Fares 30 to 59 days before departure were typically 36% lower than 14 to 29 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (24 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 |
|---|---|---|---|---|
| 14–29 days | $73 | $73 | +55% | 7 |
| 30–59 days | $47 | $47 | Cheapest seen | 12 |
| 90–179 days | $145 | $80 | +207% | 16 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Milwaukee → Denver
131 km from Chicago
$326
$131 more than flying from Chicago
5 Nov – 8 Nov · MKE → DEN · out nonstop, back nonstop
found 6 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Chicago → Colorado Springs
102 km from Denver
$403
$351 more than flying to Denver
15 Dec · RFD → COS · 3 stops
found yesterday
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 26 Jan 2027 – 30 Jan 2027. 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