Carrier route record
YXBWI→ORD
Republic Airways · Baltimore to Chicago
- Flights
- 336
- Period
- September 2025 to August 2026
- Share of route
- 13%
- Carriers
- 8
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on BWI to ORD lands a B−, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 336 flights. The strongest carrier on the route with a full sample, Envoy Air, flew 841 at 76.0% on time.
Set against the rest of the country, Republic's BWI to ORD record is 6 points better than the US average of 77.3%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.
Key figures
On time
83.0%
Arrivals under 15 minutes late, of 317 completed flights
Avg delay
99 min
Across delayed arrivals only, not all flights
Cancelled
4.76%
National rate is 1.89%
Whole route
75.5%
Every carrier on BWI to ORD, 2,677 flights
These figures cover 336 flights between September 2025 and August 2026. The median arrival is 15 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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Carrier by carrier
Republic against every carrier on BWI to ORD
Republic flew 336 of the 2,677 flights on BWI to ORD, about 13% of it. Its 83.0% on time is 8 points better than the route as a whole, which runs 75.5%. Ranked by on-time rate it is number three 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 Airways (this page)thin 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 Airlinesthin 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 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 21 points, against 2 points between the best and worst carrier.
- 5am–8am184 flights88.8%
- 8am–11am3 flights—
- 11am–2pm59 flights83.1%
- 2pm–5pm14 flights—
- 5pm–8pm—
- 8pm–5am76 flights68.3%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 88.8% of the time, against 68.3% for the overnight window. That is 21 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 184 flights scheduled in it.
Across the year
Republic on BWI to ORD through the year
- Oct–Dec 202516 flights—
- Jan–Mar 202681 flights87.2%
- Apr–Jun 2026170 flights82.3%
- Jul–Sep 202669 flights83.1%
Scale runs 75% to 95%. 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 83.0% on time across 336 flights.
Quarter by quarter Republic on BWI to ORD held fairly steady: 87.2% in Jan–Mar 2026, 82.3% in Apr–Jun 2026 and 83.1% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
Across the week, Tuesday is the strongest day at 87.0% on time and Friday the weakest at 79.1%, a spread of 8 points.
Arrival by arrival
How late Republic on BWI to ORD runs when it is late
Republic on BWI to ORD often beats the schedule: 160 of 317 completed flights, 50%, arrived 15 minutes or more early. The 54 late arrivals split 20 under half an hour, 11 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early160 flights50.5%
- Within 15 min103 flights32.5%
- 15–29 min late20 flights6.3%
- 30–59 min late11 flights3.5%
- 1–2 hours late10 flights3.2%
- 2+ hours late13 flights4.1%
Scale runs 0% to 100%.
Share of 317 completed flights by arrival against schedule.
10 of 48 late departures made up the time and arrived on time, 21% of them. In the other direction, 16 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 Republic on BWI to ORD
The latest arrival of the period was on 16 July 2026, 7 hours 59 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across July, March, April, May and February, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 July 2026 | 7 hours 59 minutes | Extreme weather |
| 19 March 2026 | 7 hours 43 minutes | Carrier |
| 15 April 2026 | 6 hours 59 minutes | Late-arriving aircraft |
| 4 May 2026 | 6 hours 48 minutes | Carrier |
| 27 February 2026 | 5 hours 10 minutes | Late-arriving aircraft |
Delay causes
Why Republic 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 5,359 reported delay minutes.
- 41%Late-arriving aircraft
- 27%Carrier
- 18%National Airspace System
- 14%Extreme weather
Extreme weather accounts for 14% 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 2.4 times the usual weather exposure. The split is drawn from 5,359 reported delay minutes.
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,359 reported delay minutes here, that single category outweighs weather by 3 to one.
Cancellations run at 4.76%, against 1.89% nationally. That is about 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
7.3% 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.
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 is a different operation and performs like one: it runs 69.6% on time across 336 flights, 13 points below 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. 336 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 BWI to ORD
Put together: the delay figures matter less here than the 4.76% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 317 completed flights over 12 months sit behind that.
Related
Where to go next
- BWI to ORD, every carrier
- Republic on ORD to BWI, the return leg
- Envoy Air on BWI to ORD76.0%
- United Airlines on BWI to ORD74.3%
- Frontier Airlines on BWI to ORD64.0%
- Republic Airways 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
- Why the first flight of the morning is statistically safest
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.