Carrier route record

YXORD→BWI

Republic Airways · Chicago to Baltimore

Flights: 274
Period: July 2025 to June 2026
Share of route: 10%
Carriers: 8

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.

Republic on ORD to BWI sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 274 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 903 at 76.4% on time.

The national on-time rate over the same period is 77.6%, so Republic on ORD to BWI runs 7 points behind the country as a whole. Across a thousand flights that is about 71 extra late arrivals.

On time

70.5%

Arrivals under 15 minutes late, of 264 completed flights

Avg delay

80 min

Across delayed arrivals only, not all flights

Cancelled

3.65%

National rate is 1.81%

Whole route

71.9%

Every carrier on ORD to BWI, 2,696 flights

These figures cover 274 flights between July 2025 and June 2026. Beyond the headline rate, 14.8% 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

Republic against every carrier on ORD to BWI

Republic flew 274 of the 2,696 flights on ORD to BWI, about 10% of it. Its 70.5% on time is about level with the route as a whole at 71.9%. Ranked by on-time rate it is number four of eight carriers on the route, where the range runs from Spirit at 77.8% to American at 57.7%. Five of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: 5 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.

On-time performance by carrier on ORD to BWI
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	27	77.8%	60 min	0.00%	B+
Envoy Air	903	76.4%	62 min	3.77%	B−
United Airlines	1,151	71.1%	61 min	1.39%	C
Republic Airways (this page)thin sample	274	70.5%	80 min	3.65%	C−
Frontier Airlinesthin sample	150	65.3%	80 min	4.00%	C−
SkyWest Airlinesthin sample	41	64.1%	81 min	2.44%	D
Southwest Airlinesthin sample	124	63.1%	84 min	1.61%	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.

Departure window

When Republic runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am7 flights—
8am–11am62 flights87.1%
11am–2pm12 flights—
2pm–5pm41 flights61.5%
5pm–8pm41 flights64.9%
8pm–5am111 flights65.4%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 87.1% of the time, against 61.5% for the afternoon window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 111 flights scheduled in it.

Across the year

Republic on ORD to BWI through the year

Jul–Sep 20257 flights—
Oct–Dec 202517 flights—
Jan–Mar 202682 flights68.4%
Apr–Jun 2026168 flights73.2%

Scale runs 60% 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 70.5% on time across 274 flights.

Split by quarter, Republic on ORD to BWI logged 7 flights in Jul–Sep 2025, 17 flights in Oct–Dec 2025, 82 flights in Jan–Mar 2026 and 168 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 70.5% annual figure is the one to use.

Across the week, Saturday is the strongest day at 85.7% on time and Wednesday the weakest at 55.9%. 30 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Republic runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 6,204 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.

Late-arriving aircraft
53%
Extreme weather
17%
National Airspace System
15%
Carrier
14%

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 monthly strip above is 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 6,204 reported delay minutes.

53% 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 6,204 reported delay minutes here, that single category outweighs weather by 3 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.

Cancellations run at 3.65%, against 1.81% nationally. That is roughly 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. 14.8% 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 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. 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 83.0% on time across 274 flights, 13 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 13 points of difference.

One caution: this is a thin sample. 274 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 Republic on ORD to BWI

Put together: the delay figures matter less here than the 3.65% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 264 completed flights over 12 months sit behind that.

Where to go next

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