Flight number record

F9 1357

Frontier Airlines · Las Vegas to Ontario

Route: LAS → ONT
Departs: 14:45
Flights: 255
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1357, check with Frontier Airlines.

F9 1357 lands a B+, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 255 flights, with a median arrival 11 minutes early.

On time

81.1%

Arrivals under 15 minutes late, of 254 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

0.39%

National rate is 1.89%

1 hour+ late

6.7%

National rate is 8.3%

These figures cover 255 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When F9 1357 flies

F9 1357 flies LAS to ONT without a single fixed slot. Its most common scheduled departure was 14:45, used on 34 of 255 flights.

Departs 14:4534 flights13.3%

Scale runs 0% to 100%.

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

A 14:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and F9 1357 runs 9 points better at 81.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

F9 1357 next to LAS to ONT

Every carrier on LAS to ONT combined arrived on time 75.4% of the time across 2,473 flights, so F9 1357 is 6 points ahead of it. Frontier flew 724 flights on the same city pair under all its flight numbers, including this one, and those ran 80.9% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 8 points.

F9 1357 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1357thin sample	255	81.1%	84 min	0.39%	B+
All Frontier Airlines on LAS–ONT	724	80.9%	73 min	0.83%	B+
All carriers on LAS–ONT	2,473	75.4%	55 min	0.69%	B+
Frontier Airlines, whole network	213,022	72.7%	84 min	2.05%	C

Across the year

F9 1357 quarter by quarter

F9 1357 did not run the same all year. Its best quarter was Jan–Mar 2026 at 85.0% on time and its weakest Jul–Sep 2026 at 73.8%, a swing of 11 points on roughly 64 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 202521 flights—
Oct–Dec 202557 flights82.5%
Jan–Mar 202660 flights85.0%
Apr–Jun 202655 flights78.2%
Jul–Sep 202662 flights73.8%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, F9 1357 did best on Thursday at 88.1% on time and worst on Monday at 68.3%. Each day rests on about 36 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late F9 1357 runs when it is late

F9 1357 often beats the schedule: 96 of 254 completed flights, 38%, arrived 15 minutes or more early. The 48 late arrivals split 14 under half an hour, 17 between 30 and 60 minutes, and 17 an hour or more.

15+ min early96 flights37.8%
Within 15 min110 flights43.3%
15–29 min late14 flights5.5%
30–59 min late17 flights6.7%
1–2 hours late9 flights3.5%
2+ hours late8 flights3.1%

Scale runs 0% to 100%.

Share of 254 completed flights by arrival against schedule.

8 of 48 late departures made up the time and arrived on time, 17% of them. 8 flights left on time and still arrived late.

The worst days

Worst days for F9 1357

The latest arrival of the period was on 25 May 2026, 15 hours 42 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of F9 1357 in the period
Date	Arrived late by	Largest filed cause
25 May 2026	15 hours 42 minutes	Carrier
13 July 2026	4 hours 2 minutes	Extreme weather
10 June 2026	3 hours 26 minutes	Late-arriving aircraft
27 February 2026	3 hours	Carrier
23 August 2026	2 hours 39 minutes	Carrier

Delay causes

Why F9 1357 runs late

Carrier accounts for 47% of the 4,013 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
47%
Late-arriving aircraft
37%
National Airspace System
12%
Extreme weather
4%

37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,013 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 4,013 delay minutes reported on F9 1357.

Cancellations are rare at 0.39%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

6.7% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

Every one of the 255 flights under F9 1357 in the data flew LAS to ONT. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 255 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 F9 1357

For a booking, read F9 1357 as 81.1% on time with 0.39% cancelled over 255 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Frontier 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures