Flight number record

OO 4705

SkyWest Airlines · Denver to Helena

Route: DEN → HLN
Departs: 19:15
Flights: 332
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4705, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.

OO 4705 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 332 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.6%, so OO 4705 runs 4 points behind the country as a whole. Across a thousand flights that is about 41 extra late arrivals.

On time

73.5%

Arrivals under 15 minutes late, of 324 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

2.11%

National rate is 1.81%

1 hour+ late

13.3%

National rate is 8.1%

These figures cover 332 flights between July 2025 and June 2026. Beyond the headline rate, 13.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When OO 4705 flies

OO 4705 flies DEN to HLN without a single fixed slot. Its most common scheduled departure was 19:15, used on 89 of 332 flights, with 19:18 (65 flights) and 19:14 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:1589 flights26.8%
Departs 19:1865 flights19.6%
Departs 19:1449 flights14.8%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 19:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 4705 runs 5 points better at 73.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 4705 next to DEN to HLN

Every carrier on DEN to HLN combined arrived on time 78.9% of the time across 844 flights, so OO 4705 is 5 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 6 points.

OO 4705 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4705thin sample	332	73.5%	82 min	2.11%	C
All SkyWest Airlines on DEN–HLN	844	78.9%	73 min	1.07%	B
All carriers on DEN–HLN	844	78.9%	73 min	1.07%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4705 quarter by quarter

OO 4705 did not run the same all year. Its best quarter was Oct–Dec 2025 at 82.4% on time and its weakest Jul–Sep 2025 at 57.0%, a swing of 25 points on roughly 83 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights57.0%
Oct–Dec 202591 flights82.4%
Jan–Mar 202687 flights81.2%
Apr–Jun 202662 flights72.6%

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4705 did best on Thursday at 81.8% on time and worst on Friday at 65.2%. Each day rests on about 47 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4705 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 7,079 reported delay minutes.

National Airspace System
40%
Late-arriving aircraft
27%
Extreme weather
17%
Carrier
16%

Extreme weather accounts for 17% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.8 times the usual weather exposure. The split is drawn from 7,079 delay minutes reported on OO 4705.

Cancellations sit at 2.11% against a national 1.81%, which is ordinary. Diversions add another 0.30%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 594 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on one other city pair in the data, including DEN to SAF (32), but none flew often enough under OO 4705 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to HLN only.

One caution: this is a thin sample. 332 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking OO 4705

For a booking, OO 4705 is a flight to put a long connection behind. 13.3% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

Where to go next

A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures