Portland (PDX) to Denver (DEN) flights

United Airlines, Southwest Airlines, Alaska Airlines, Frontier Airlines fly nonstop from Portland International Airport to Denver International Airport, with about 102 flights a week in July 2026. The 991-mile flight takes about 2h 29m gate to gate.

From

PDX

Portland

Portland International Airport

DEN

Denver

Denver International Airport

Distance: 991 mi · 1,595 km
Flight time: 2h 29m
Airlines: 4
Seats filled: 86%

Flights a week, July 2026

4,260 flights and 640,204 passengers in 12 months

Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying PDX to DEN

Airline	Flights a week	Aircraft	Passengers (12 months)	Flight time
United Airlines	39	Boeing 737-900ER, Airbus A321, Boeing 737-800	275,117	2h 29m
Southwest Airlines	36	Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7	225,812	2h 23m
Alaska Airlines	20	Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800	87,823	2h 37m
Frontier Airlines	7	Airbus A321, Airbus A320neo, Airbus A320-100/200	50,577	2h 37m
SkyWest AirlinesSeasonal or ended	n/a	Embraer E175	875	2h 42m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

PDX to DEN flight schedule

24 flight numbers flew this route in August 2026, 8 of them almost daily. The first usually leaves at 5:00am and the last at 7:35pm. Times are local and can change; check with the airline before you book.

Flight	Departs	Arrives	Days flown in August 2026	On time (12 months)
UA 459United Airlines	5:00am	8:39am	31	97%
WN 3123Southwest Airlines	6:05am	9:30am	28	93%
AS 684Alaska Airlines	7:18am	11:07am	13	89%
AS 401Alaska Airlines	7:20am	11:03am	15	93%
UA 2375United Airlines	8:40am	12:19pm	31	97%
WN 4156Southwest Airlines	10:35am	2:10pm	12	64%
UA 545United Airlines	10:50am	2:29pm	21	76%
WN 654Southwest Airlines	10:55am	2:30pm	12	83%
UA 2793United Airlines	11:05am	2:43pm	10	90%
F9 1790Frontier Airlines	12:20pm	4:03pm	23	83%
WN 360Southwest Airlines	12:40pm	4:05pm	4	n/a
UA 1411United Airlines	12:45pm	4:25pm	31	86%
WN 1698Southwest Airlines	1:25pm	4:55pm	8	n/a
WN 3124Southwest Airlines	1:35pm	5:05pm	28	42%
WN 2513Southwest Airlines	2:20pm	5:50pm	4	n/a
AS 1809Alaska Airlines	2:30pm	6:09pm	18	60%
AS 1346Alaska Airlines	2:51pm	6:32pm	13	74%
UA 1787United Airlines	4:07pm	7:45pm	31	82%
WN 3125Southwest Airlines	4:20pm	7:50pm	16	47%
F9 2554Frontier Airlines	5:56pm	9:39pm	8	75%
AS 466Alaska Airlines	5:58pm	9:46pm	8	n/a
AS 1627Alaska Airlines	6:04pm	9:40pm	17	65%
UA 2334United Airlines	7:07pm	10:41pm	18	90%
WN 4359Southwest Airlines	7:35pm	11:05pm	16	67%

Is PDX to DEN on time?

From September 2025 to August 2026, 82% of 4,280 flights arrived within 15 minutes of schedule and 0.4% were cancelled. Flights leaving around 5am were the most punctual (96%), those around 2pm the least (63%). Most delay time was caused by late-arriving aircraft (38%).

Airline	Flights	On time	Average delay	Cancelled
United Airlines	1,820	91%	7 min	0.5%
Southwest Airlines	1,548	74%	14 min	0.3%
Alaska Airlines	656	78%	13 min	0.3%
Frontier Airlines	256	82%	10 min	0.4%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departure	Flights	On time
5am to 6am	560	96%
6am to 7am	190	87%
7am to 8am	412	90%
8am to 9am	517	95%
10am to 11am	212	76%
11am to 12pm	176	83%
12pm to 1pm	474	85%
1pm to 2pm	206	69%
2pm to 3pm	477	63%
3pm to 4pm	117	86%
4pm to 5pm	338	77%
5pm to 6pm	128	62%
6pm to 7pm	230	79%
7pm to 8pm	160	72%

Flights by month

Month	Flights	Passengers
August 2025	430	69,258
September 2025	393	60,523
October 2025	395	61,145
November 2025	339	51,043
December 2025	345	53,085
January 2026	269	37,574
February 2026	244	33,840
March 2026	293	44,060
April 2026	303	45,391
May 2026	368	53,326
June 2026	431	65,339
July 2026	450	65,620

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.