Route on-time record
PDX to LAS: most on-time flights and the best time to fly
Portland (Portland International Airport) to Las Vegas (Harry Reid International Airport). 3,025 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was Southwest 1188 at 6:25 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PDX → LAS
Portland to Las Vegas: 3,025 nonstop flights a year
On time (12 months)
81%
Cancelled
0.5%
avg delay 12 min
Best time to leave
Before 9 AM
93% on time vs 61% 6 to 9 PM
Most reliable airline
Spirit
83% chance on time
Lowest nonstop fare seen in the next two months: $233 (Southwest 4651 on 2026-10-30). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Southwest 1188
6:25 AM → 8:35 AM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 123, 384; its record covers all of them.
94%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 97% of the time (77 flights, Jun 2025 to May 2026).
- Never cancelled in 77 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 61%).
Moderate track record · 77 flights
Find Southwest 1188 fares Opens this date on Aviasales#2 · Alaska 627
7:30 AM → 9:46 AM2h 18m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.5%
- Avg arrival delay
- 7 min
- Arrived on time 87% of the time (190 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 61%).
Moderate track record · 190 flights
Find Alaska 627 fares Opens this date on Aviasales#3 · Alaska 102
4:46 PM → 7:06 PM2h 20m nonstop
Local times, typical schedule. Last flown 2026-03-16.
86%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 90% of the time (10 flights, Jun 2025 to May 2026).
- 84% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find Alaska 102 fares Opens this date on Aviasales#4 · Alaska 778
2:30 PM → 4:50 PM2h 21m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 85% of the time (357 flights, Jun 2025 to May 2026).
- Never cancelled in 357 scheduled flights.
Strong track record · 357 flights
Find Alaska 778 fares Opens this date on Aviasales#5 · Alaska 757
10:45 AM → 1:06 PM2h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.9%
- Avg arrival delay
- 10 min
- Arrived on time 83% of the time (345 flights, Jun 2025 to May 2026).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Strong track record · 345 flights
Find Alaska 757 fares Opens this date on Aviasales#6 · Alaska 531
5:49 PM → 8:12 PM2h 23m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.0%
- Avg arrival delay
- 9 min
- Arrived on time 84% of the time (190 flights, Jun 2025 to May 2026).
Moderate track record · 190 flights
Find Alaska 531 fares Opens this date on Aviasales#7 · Alaska 728
9:41 PM → 11:57 PM2h 16m nonstop
Local times, typical schedule. Last flown 2026-04-20.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.5%
- Avg arrival delay
- 10 min
- Arrived on time 78% of the time (188 flights, Jun 2025 to May 2026).
Moderate track record · 188 flights
Find Alaska 728 fares Opens this date on Aviasales#8 · Alaska 534
5:43 PM → 8:07 PM2h 24m nonstop
Local times, typical schedule. Last flown 2026-05-12.
78%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 81% of the time (21 flights, Jun 2025 to May 2026).
- 65% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Alaska 534 fares Opens this date on Aviasales#9 · Southwest 3661
11:00 AM → 1:10 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-27.
77%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 75% of the time (16 flights, Jun 2025 to May 2026).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 3661 fares Opens this date on Aviasales#10 · Southwest 473
10:40 AM → 12:50 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-30.
73%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 71% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 473 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Spirit Airlines83%
188 flights · 84% on time as flown · 0.5% cancel
- Alaska Airlines83%
1,522 flights · 83% on time as flown · 0.5% cancel
- Southwest Airlines78%
1,150 flights · 78% on time as flown · 0.2% cancel
- Frontier Airlines73%
165 flights · 72% on time as flown · 1.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
750 flights · avg delay 5 min
- 9 AM to noon81%
744 flights · avg delay 12 min
- Noon to 3 PM78%
572 flights · avg delay 12 min
- 3 to 6 PM76%
552 flights · avg delay 16 min
- 6 to 9 PM61%
199 flights · avg delay 25 min
- After 9 PM78%
208 flights · avg delay 11 min
Best day: Saturday (87%). Worst: Friday (78%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft44%
- Airline (crew, maintenance, boarding)32%
- Air traffic control and airport volume25%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
PDX to LAS questions
- What time of day is best to fly PDX to LAS?
- Before 9 AM: 93% of flights arrived on time, against 61% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from PDX to LAS?
- Spirit, with a season-adjusted 83% chance of operating and arriving on time over 188 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on PDX to LAS?
- July (74% on time); the best was November (87%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from PDX
- LAS to PDX (return)
- PDX to SEA 84%
- PDX to LAX 87%
- PDX to DEN 80%
- PDX to PHX 80%
- PDX to SFO 75%
- PDX to ORD 77%
- PDX to DFW 80%
- PDX to SLC 88%
- PDX to SMF 83%
- PDX to SAN 80%
- PDX to SJC 82%
- PDX to ATL 87%
Live status: FAA delays and ground stops