Carrier route record
F9BWI→ORD
Frontier Airlines · Baltimore to Chicago
- Flights
- 132
- Period
- September 2025 to August 2026
- Share of route
- 5%
- Carriers
- 8
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on BWI to ORD draws a D−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about 3.3 hours behind schedule. Build slack into anything you connect to. That rests on 132 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 841 at 76.0% on time.
The national on-time rate over the same period is 77.3%, so Frontier on BWI to ORD runs 13 points behind the country as a whole. Across a thousand flights that is about 133 extra late arrivals.
Key figures
On time
64.0%
Arrivals under 15 minutes late, of 125 completed flights
Avg delay
199 min
Across delayed arrivals only, not all flights
Cancelled
4.55%
National rate is 1.89%
Whole route
75.5%
Every carrier on BWI to ORD, 2,677 flights
These figures cover 132 flights between September 2025 and August 2026. Beyond the headline rate, 20.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Frontier against every carrier on BWI to ORD
Frontier flew 132 of the 2,677 flights on BWI to ORD, about 5% of it. Its 64.0% on time is 12 points worse than the route as a whole, which runs 75.5%. Ranked by on-time rate it is number seven of eight carriers on the route, where the range runs from Southwest at 90.3% to American at 38.5%. Five of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 2 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 62 | 90.3% | 59 min | 0.00% | A+ |
| Spirit Airlinesthin sample | 10 | 90.0% | 61 min | 0.00% | A+ |
| Republic Airwaysthin sample | 336 | 83.0% | 99 min | 4.76% | B− |
| SkyWest Airlinesthin sample | 17 | 76.5% | 26 min | 0.00% | B+ |
| Envoy Air | 841 | 76.0% | 84 min | 3.80% | B− |
| United Airlines | 1,253 | 74.3% | 86 min | 1.12% | C |
| Frontier Airlines (this page)thin sample | 132 | 64.0% | 199 min | 4.55% | D− |
| American Airlinesthin sample | 26 | 38.5% | 81 min | 0.00% | F+ |
Envoy Air cancels 3.8% 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.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Frontier runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 132 flights.
There are not enough flights in each departure window to split Frontier's BWI to ORD record by time of day without the percentages moving on noise. The headline rate of 64.0% is the reliable figure here.
Across the year
Frontier on BWI to ORD through the year
- Jul–Sep 202517 flights—
- Oct–Dec 202545 flights59.5%
- Jan–Mar 202640 flights65.8%
- Apr–Jun 202622 flights—
- Jul–Sep 20268 flights—
Scale runs 50% to 70%. 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 64.0% on time across 132 flights.
Split by quarter, Frontier on BWI to ORD logged 17 flights in Jul–Sep 2025, 45 flights in Oct–Dec 2025, 40 flights in Jan–Mar 2026, 22 flights in Apr–Jun 2026 and 8 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 64.0% annual figure is the one to use.
Across the week, Monday is the strongest day at 67.6% on time and Sunday the weakest at 60.0%, a spread of 8 points.
Arrival by arrival
How late Frontier on BWI to ORD runs when it is late
Frontier on BWI to ORD often beats the schedule: 40 of 125 completed flights, 32%, arrived 15 minutes or more early. When Frontier on BWI to ORD is late it tends to be very late: 25 of its 45 late arrivals were an hour or more behind, and 15 were two hours or more.
- 15+ min early40 flights32.0%
- Within 15 min40 flights32.0%
- 15–29 min late8 flights6.4%
- 30–59 min late12 flights9.6%
- 1–2 hours late10 flights8.0%
- 2+ hours late15 flights12.0%
Scale runs 0% to 100%.
Share of 125 completed flights by arrival against schedule.
6 of 41 late departures made up the time and arrived on time, 15% of them. In the other direction, 10 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for Frontier on BWI to ORD
The latest arrival of the period was on 27 March 2026, 16 hours 51 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across March, November, April and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 March 2026 | 16 hours 51 minutes | Carrier |
| 10 November 2025 | 15 hours 45 minutes | National Airspace System |
| 1 April 2026 | 14 hours 53 minutes | Extreme weather |
| 29 November 2025 | 14 hours 6 minutes | Extreme weather |
| 7 December 2025 | 12 hours 42 minutes | Carrier |
Delay causes
Why Frontier runs late on this route
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 8,933 reported delay minutes.
- 29%Late-arriving aircraft
- 27%Extreme weather
- 25%Carrier
- 20%National Airspace System
Extreme weather accounts for 27% 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 monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 4.5 times the usual weather exposure. The split is drawn from 8,933 reported delay minutes.
Cancellations run at 4.55%, against 1.89% nationally. That is roughly one flight in twenty 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
20.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 622 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.
The return leg runs 64.3% on time across 132 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 132 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 BWI to ORD
Put together: the delay figures matter less here than the 4.55% cancellation rate. A late arrival costs you about 3.3 hours; a cancelled flight costs you the day. Book the 2pm–5pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 125 completed flights over 12 months sit behind that.
Related
Where to go next
- BWI to ORD, every carrier
- Frontier on ORD to BWI, the return leg
- Republic Airways on BWI to ORD83.0%
- Envoy Air on BWI to ORD76.0%
- United Airlines on BWI to ORD74.3%
- Frontier Airlines network-wide record
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- How often a connection fails at the major US hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.