Carrier route record
F9JFK→ORD
Frontier Airlines · New York to Chicago
- Flights
- 116
- Period
- July 2025 to June 2026
- Share of route
- 6%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on JFK to ORD earns an F−, which is as low as this site's scale goes for a reason. Only 51.4% of flights arrive inside the 15-minute window, 26 points worse than the national rate of 77.6%. Late arrivals average close to two hours. Treat any tight connection here as a coin flip. That rests on 116 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 759 at 76.8% on time.
Republic Airways is the most reliable of the three carriers covered here at 76.8% on time across 759 flights.
Key figures
On time
51.4%
Arrivals under 15 minutes late, of 111 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
4.31%
National rate is 1.81%
Whole route
71.5%
Every carrier on JFK to ORD, 2,013 flights
These figures cover 116 flights between July 2025 and June 2026. Beyond the headline rate, 25.2% 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.
Carrier by carrier
Frontier against every carrier on JFK to ORD
Frontier flew 116 of the 2,013 flights on JFK to ORD, about 6% of it. Its 51.4% on time is 20 points worse than the route as a whole, which runs 71.5%. Ranked by on-time rate it is last of five carriers on the route, where the range runs from Republic at 76.8% to Frontier at 51.4%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Republic Airways arrives on time 76.8% of the time; JetBlue Airways manages 67.7%. Sample sizes sit next to every figure, because a two-point gap across 572 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 759 | 76.8% | 83 min | 5.53% | B− |
| American Airlines | 552 | 73.0% | 89 min | 5.07% | C− |
| JetBlue Airways | 572 | 67.7% | 82 min | 3.85% | C− |
| Delta Air Linesthin sample | 14 | 61.5% | 266 min | 0.00% | D+ |
| Frontier Airlines (this page)thin sample | 116 | 51.4% | 101 min | 4.31% | F− |
Republic Airways cancels 5.5% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 34 points, against 9 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am—
- 11am–2pm68 flights65.2%
- 2pm–5pm48 flights31.1%
- 5pm–8pm—
- 8pm–5am—
Scale runs 25% to 70%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 65.2% on time, ahead of 2pm–5pm at 31.1%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 11am–2pm window is the busiest, with 68 flights scheduled in it.
Across the year
Frontier on JFK to ORD through the year
- Oct–Dec 202557 flights61.8%
- Jan–Mar 202659 flights41.1%
Scale runs 35% to 65%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 51.4% on time across 116 flights.
Split by quarter, Frontier on JFK to ORD logged 57 flights in Oct–Dec 2025 and 59 flights in Jan–Mar 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 51.4% annual figure is the one to use.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 72% of the 5,465 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 72%Late-arriving aircraft
- 25%National Airspace System
- 4%Carrier
72% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,465 reported delay minutes here, that single category outweighs weather by 72 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,465 reported delay minutes.
Cancellations run at 4.31%, against 1.81% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 25.2% 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 740 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 return leg is a different operation and performs like one: it runs 59.8% on time across 117 flights, 8 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.
One caution: this is a thin sample. 116 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 Frontier on JFK to ORD
Put together: the delay figures matter less here than the 4.31% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 111 completed flights over 12 months sit behind that.
Related
Where to go next
- JFK to ORD, every carrier
- Frontier on ORD to JFK, the return leg
- Republic Airways on JFK to ORD76.8%
- American Airlines on JFK to ORD73.0%
- JetBlue Airways on JFK to ORD67.7%
- Frontier Airlines network-wide record
- John F. Kennedy International (JFK) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.