Denver to Washington DEN → IAD
Denver International Airport (DEN) → Washington Dulles International Airport (IAD)
The cheapest return found recently is $300 with Frontier Airlines, 2 Nov – 6 Nov, found 2 days ago. The cheapest one-way found recently is $146 with Frontier Airlines, 26 Oct, found 3 days ago.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$300
2 Nov – 6 Nov · Frontier Airlines
Denver International Airport (DEN) → Washington Dulles International Airport (IAD)
Leaves 9:19 p.m. · Return leaves 9:06 p.m. · 25 h 33 min of travel, both ways together
out 1 stop, back 1 stop
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$300 2 Nov – 6 Novfound 2 days agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 24 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $159 to $414.
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 return price?
Not enough comparable prices yet: we hold return fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 4-night return fares leaving within 3 days of 2 Nov to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 2 Nov – 6 Nov | $300 | Frontier Airlines | Denver International Airport (DEN) → Washington Dulles International Airport (IAD) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
Airlines on the cheapest dates: Frontier Airlines.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $99 to $127.
Cheapest one-way found recently
$146
26 Oct · Frontier Airlines
Denver International Airport (DEN) → Washington Dulles International Airport (IAD)
Leaves 6:42 p.m. · 9 h 38 min trip
1 stop
found 3 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$146 26 Octfound 3 days agoOpen this trip
$89 1 Decfound 5 days agoOpen this trip
What have prices looked like?
Over 15 days, 1 Oct to 18 Oct, the cheapest one-way we saw each day was $89 to $221.
15 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 3 departure dates from 26 Oct to 1 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?
We hold no other one-way fares leaving within 3 days of 26 Oct to compare.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 26 Oct | $146 | Frontier Airlines | Denver International Airport (DEN) → Washington Dulles International Airport (IAD) | 1 stop | found 3 days ago | Open this trip |
| 11 Nov | $108 | Frontier Airlines | Denver International Airport (DEN) → Washington Dulles International Airport (IAD) | 1 stop | found 5 days ago | Open this trip |
| 1 Dec | $89 | Frontier Airlines | Denver International Airport (DEN) → Washington Dulles International Airport (IAD) | 1 stop | found 5 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $89.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Denver 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 2 Nov – 6 Nov in another cabin: Premium economy · Business · First
Today's prices for 26 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Denver to Washington?
Return
Fares 60 to 89 days before departure were typically 41% lower than 0 to 6 days before departure.
From the cheapest return 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 |
|---|---|---|---|---|
| 0–6 days | $412 | $258 | +70% | 7 |
| 14–29 days | $282 | $159 | +16% | 10 |
| 60–89 days | $243 | $243 | Cheapest seen | 8 |
| 180+ days | $414 | $414 | +70% | 8 |
One-way
Not enough history yet: in 15 days of one-way prices, 1 Oct to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Denver → Baltimore
57 km from Washington
$238
$62 less than flying to Washington
16 Nov – 30 Nov · DEN → BWI · out 1 stop, back 3 stops
found 4 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Denver → Baltimore
57 km from Washington
$99
$47 less than flying to Washington
15 Dec · DEN → BWI · 2 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 2 Nov – 6 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