Carrier route record

F9ORD→BWI

Frontier Airlines · Chicago to Baltimore

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 ORD to BWI draws a D−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half 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 77.3% on time.

The national on-time rate over the same period is 77.3%, so Frontier on ORD to BWI runs 13 points behind the country as a whole. Across a thousand flights that is about 130 extra late arrivals.

On time

64.3%

Arrivals under 15 minutes late, of 126 completed flights

Avg delay

92 min

Across delayed arrivals only, not all flights

Cancelled

4.55%

National rate is 1.89%

Whole route

72.3%

Every carrier on ORD to BWI, 2,679 flights

These figures cover 132 flights between September 2025 and August 2026. Beyond the headline rate, 15.9% 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 ORD to BWI

Frontier flew 132 of the 2,679 flights on ORD to BWI, about 5% of it. Its 64.3% on time is 8 points worse than the route as a whole, which runs 72.3%. Ranked by on-time rate it is number seven of eight carriers on the route, where the range runs from Spirit at 100.0% to American at 57.7%. Five of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. Envoy Air arrives on time 77.3% of the time; United Airlines manages 70.3%. Sample sizes sit next to every figure, because a two-point gap across 1,257 flights means less than a ten-point one.

On-time performance by carrier on ORD to BWI
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	9	100.0%	—	0.00%	A+
Southwest Airlinesthin sample	62	80.6%	53 min	0.00%	B+
Envoy Air	841	77.3%	63 min	3.80%	B−
United Airlines	1,257	70.3%	65 min	1.59%	C
Republic Airwaysthin sample	336	69.6%	89 min	5.65%	C−
SkyWest Airlinesthin sample	16	68.8%	57 min	0.00%	C+
Frontier Airlines (this page)thin sample	132	64.3%	92 min	4.55%	D−
American Airlinesthin sample	26	57.7%	92 min	0.00%	D+

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.

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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 ORD to BWI record by time of day without the percentages moving on noise. The headline rate of 64.3% is the reliable figure here.

Across the year

Frontier on ORD to BWI through the year

Jul–Sep 202517 flights—
Oct–Dec 202545 flights52.4%
Jan–Mar 202640 flights73.7%
Apr–Jun 202622 flights—
Jul–Sep 20268 flights—

Scale runs 45% to 80%. 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 64.3% on time across 132 flights.

Split by quarter, Frontier on ORD to BWI 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 64.3% annual figure is the one to use.

Across the week, Monday is the strongest day at 64.7% on time and Sunday the weakest at 56.7%, a spread of 8 points.

Arrival by arrival

How late Frontier on ORD to BWI runs when it is late

The 45 late arrivals split 12 under half an hour, 13 between 30 and 60 minutes, and 20 an hour or more.

15+ min early23 flights18.3%
Within 15 min58 flights46.0%
15–29 min late12 flights9.5%
30–59 min late13 flights10.3%
1–2 hours late9 flights7.1%
2+ hours late11 flights8.7%

Scale runs 0% to 100%.

Share of 126 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 32 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 15 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 BWI.

The worst days

Worst days for Frontier on ORD to BWI

The latest arrival of the period was on 22 December 2025, 8 hours 42 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.

The latest arrivals of Frontier on ORD to BWI in the period
Date	Arrived late by	Largest filed cause
22 December 2025	8 hours 42 minutes	Late-arriving aircraft
26 November 2025	4 hours 57 minutes	Late-arriving aircraft
30 November 2025	4 hours 5 minutes	Late-arriving aircraft
30 August 2026	3 hours 56 minutes	National Airspace System
7 December 2025	3 hours 51 minutes	Carrier

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 45% of the 4,153 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
45%
Carrier
31%
National Airspace System
23%
Extreme weather
1%

45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,153 reported delay minutes here, that single category outweighs weather by 45 to one. The split is drawn from 4,153 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

15.9% 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 64.0% 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 ORD to BWI

Put together: the delay figures matter less here than the 4.55% cancellation rate. A late arrival costs you an hour and a half; 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. 126 completed flights over 12 months sit behind that.

Where to go next

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