Chicago to Washington MDW, ORD, RFD → DCA, IAD
Chicago Midway International Airport (MDW), O'Hare International Airport (ORD), Chicago Rockford International Airport (RFD) → Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD)
The cheapest return found recently is $252 with United Airlines, 20 Oct – 22 Oct, found today. The cheapest one-way found recently is $78 with Allegiant Air, 12 Nov, found today.
Return
The cheapest return fare on each of 7 departure dates is usually $265 to $302.
Cheapest return found recently
$252
20 Oct – 22 Oct · United Airlines
O'Hare International Airport (ORD) → Ronald Reagan National Airport (DCA)
Leaves 12:40 p.m. · Return leaves 10:18 p.m. · 4 h 16 min of travel, both ways together
out nonstop, back nonstop
found today
Cheapest nonstop return
$252
20 Oct – 22 Oct · United Airlines
O'Hare International Airport (ORD) → Ronald Reagan National Airport (DCA)
Leaves 12:40 p.m. · Return leaves 10:18 p.m. · 4 h 16 min of travel, both ways together
out nonstop, back nonstop
found today
Found recently, and the cheapest we hold
$252 20 Oct – 22 Octfound todaySee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $116 to $276.
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 7 departure dates from 20 Oct to 15 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 2-night return fares leaving within 3 days of 20 Oct to compare.
Every date we hold
9 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct – 22 Oct | $252 | United Airlines | O'Hare International Airport (ORD) → Ronald Reagan National Airport (DCA) | out nonstop, back nonstop | found today | See prices for these dates |
| 30 Oct – 3 Nov | $321 | Frontier Airlines | Chicago Midway International Airport (MDW) → Washington Dulles International Airport (IAD) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 12 Nov – 15 Nov | $283 | Frontier Airlines | Chicago Midway International Airport (MDW) → Washington Dulles International Airport (IAD) | out 1 stop, back 2 stops | found 4 days ago | See prices for these dates |
| 14 Nov – 15 Nov | $253 | Frontier Airlines | O'Hare International Airport (ORD) → Washington Dulles International Airport (IAD) | out 1 stop, back nonstop | found 4 days ago | See prices for these dates |
| 26 Nov – 30 Nov | $299 | Frontier Airlines | Chicago Midway International Airport (MDW) → Washington Dulles International Airport (IAD) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 14 Jan 2027 – 19 Jan 2027 | $276 | Southwest Airlines | Chicago Midway International Airport (MDW) → Ronald Reagan National Airport (DCA) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 15 Jan 2027 – 18 Jan 2027 | $305 | Frontier Airlines | O'Hare International Airport (ORD) → Washington Dulles International Airport (IAD) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
Which month looks cheapest?
October 2026 is the cheapest month — from $252.
Airlines on the cheapest dates: Frontier Airlines, United Airlines, Southwest Airlines.
One-way
The cheapest one-way fare on each of 8 departure dates is usually $102 to $115.
Cheapest one-way found recently
$78
12 Nov · Allegiant Air
Chicago Rockford International Airport (RFD) → Washington Dulles International Airport (IAD)
Leaves 9:30 a.m. · 9 h 41 min trip
stops unknown
found today
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$78 12 Novfound todayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $86 to $271.
At $78, the cheapest one-way found recently is below 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 one-way price?
Compared with the cheapest one-way fare on each of 8 departure dates from 31 Oct to 18 Dec, 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 one-way fares on 1 other departure date within 3 days of 12 Nov, and it is not cheaper.
Every date we hold
11 fares on 8 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 31 Oct | $104 | Frontier Airlines | O'Hare International Airport (ORD) → Washington Dulles International Airport (IAD) | 1 stop | found 3 days ago | Open this trip |
| 12 Nov | $78 | Allegiant Air | Chicago Rockford International Airport (RFD) → Washington Dulles International Airport (IAD) | stops unknown | found today | Open this trip |
| 14 Nov | $302 | Allegiant Air | Chicago Rockford International Airport (RFD) → Washington Dulles International Airport (IAD) | 1 stop | found yesterday | Open this trip |
| 16 Nov | $94 | Frontier Airlines | Chicago Midway International Airport (MDW) → Washington Dulles International Airport (IAD) | 1 stop | found yesterday | Open this trip |
| 24 Nov | $110 | Frontier Airlines | O'Hare International Airport (ORD) → Washington Dulles International Airport (IAD) | 1 stop | found 3 days ago | Open this trip |
| 25 Nov | $110 | Frontier Airlines | Chicago Midway International Airport (MDW) → Washington Dulles International Airport (IAD) | 1 stop | found 3 days ago | Open this trip |
| 17 Dec | $110 | Frontier Airlines | O'Hare International Airport (ORD) → Washington Dulles International Airport (IAD) | 1 stop | found 5 days ago | Open this trip |
| 18 Dec | $130 | Frontier Airlines | Chicago Midway International Airport (MDW) → Washington Dulles International Airport (IAD) | 1 stop | found 5 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $78.
Airlines on the cheapest dates: Frontier Airlines, Allegiant Air.
Premium cabin fares from Chicago to Washington
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 20 Oct – 22 Oct in another cabin: Premium economy · Business · First
Today's prices for 12 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Chicago to Washington?
Return
Fares 14 to 29 days before departure were typically 64% 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 | $494 | $252 | +179% | 12 |
| 7–13 days | $518 | $276 | +193% | 8 |
| 14–29 days | $177 | $116 | Cheapest seen | 19 |
| 30–59 days | $239 | $171 | +35% | 21 |
One-way
The cheapest fares were 7 to 13 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 |
|---|---|---|---|---|
| 7–13 days | $105 | $104 | Cheapest seen | 13 |
| 14–29 days | $160 | $94 | +52% | 12 |
| 30–59 days | $105 | $86 | +0% | 15 |
| 60–89 days | $161 | $110 | +53% | 14 |
| 90–179 days | $117 | $117 | +11% | 8 |
| 180+ days | $187 | $187 | +78% | 12 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Chicago → Baltimore
57 km from Washington
$364
$112 more than flying to Washington
20 Oct – 22 Oct · MDW → BWI · out 1 stop, back 1 stop
found today
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Chicago → Baltimore
57 km from Washington
$129
$51 more than flying to Washington
16 Nov · RFD → BWI · 2 stops
found today
Milwaukee → Washington
131 km from Chicago
$268
$190 more than flying from Chicago
24 Oct · MKE → DCA · nonstop
found 5 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 20 Oct – 22 Oct. 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