Your next trip, last seen at €61
Lowest observedWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
- Lowest observed
- €61, departing 3 Dec 2026 (Last checked: 6 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 36Check live prices for this route
- Airlines seen
- Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines, Delta Air Lines
- Reported fastest flight
- 2h 20m
- Non-stop
- Yes
About this route
Explore the fares we observed from Portland to Denver. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,579 km
- Reported fastest flight
- 2h 20m
- Airlines seen
- Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines, Delta Air Lines
- Alternative airports
- APA
Route-level information; individual journeys vary.
Published schedules report non-stop service with Frontier Airlines, United Airlines, Southwest Airlines. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Alaska Airlines | 17 / 37 | |
| Frontier Airlines | 14 / 37 | |
| Southwest Airlines | 3 / 37 | |
| United Airlines | 3 / 37 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Portland International Airport (PDX) → Portland, city gazetteer reference point (45.5051, -122.6750): ≈ 11 km.
- Denver International Airport (DEN) → Denver, city gazetteer reference point (39.7392, -104.9847): ≈ 30 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by day of the week
Cheapest day of the week from Portland to Denver: Thursday, from €61 (checked 6 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €135 | 5 |
| Tuesday | €125 | 4 |
| Wednesday | €153 | 5 |
| Thursday | €61 | 5 |
| Friday | €157 | 5 |
| Saturday | €100 | 7 |
| Sunday | €125 | 5 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest one-way fare we saw per airline
Cheapest airline from Portland to Denver: Frontier Airlines, from €61 (checked 6 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €61Dec 3, 2026 | 18 |
| Alaska Airlines | €100Dec 3, 2026 | 18 |
| Southwest Airlines | €100Dec 3, 2026 | 4 |
| United Airlines | €100Dec 3, 2026 | 4 |
| Delta Air Lines | €109Feb 20, 2027 | 3 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Portland to Denver?
The lowest fare we have observed is €61, found on 6 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Portland to Denver?
In our observations December 2026 is the cheapest month so far, at €61.
Are there direct flights from Portland to Denver?
Yes. We have seen non-stop flights on this route, flown by Frontier Airlines, United Airlines, Southwest Airlines.
Which airlines fly from Portland to Denver?
These are the carriers we have seen on the route: Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines, Delta Air Lines.
How long does the flight from Portland to Denver take?
The average journey time across the 31 fares we observed is 3h 30m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Portland to Denver fares were non-stop?
29 of the 37 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Portland to Denver?
For Portland to Denver, examples of observed one-way non-stop offers checked within the last 14 days: Alaska Airlines (17), Frontier Airlines (14), Southwest Airlines (3). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Portland to Denver?
Cheapest day of the week from Portland to Denver: Thursday, from €61 (checked 6 Oct 2026).
Which airline has the lowest fare from Portland to Denver?
Cheapest airline from Portland to Denver: Frontier Airlines, from €61 (checked 6 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
Keep exploring
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Recently observed fares. Prices may change.
Last checked: 6 Oct 2026