Route reliability record
BDL→BWI
Hartford to Baltimore
- Flights
- 1,756
- Period
- July 2025 to June 2026
- Distance
- 283 mi
- Carriers
- 1
This route lands a B, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,756 BDL to BWI flights, with a median arrival 4 minutes early.
Best time to fly BDL to BWI: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 93.8% of the time and Wednesday flights 87.9%, against 82.9% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.6%. That gap is worth roughly 53 fewer late arrivals for every thousand flights.
Key figures
On time
82.9%
Arrivals under 15 minutes late, of 1,723 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.71%
National rate is 1.81%
Best carrier
Southwest
82.9% on time across 1,756 flights
These figures cover 1,756 flights between July 2025 and June 2026. The median arrival is 4 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.
Carrier by carrier
Which airline is most reliable on BDL to BWI
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 1,756 | 82.9% | 56 min | 1.71% | B |
Best ways to make this trip
The most reliable ways to fly Hartford to Baltimore
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 3 of the top 4 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. BDL → IADHartford to Washington | United Airlines | 86.5% | 87.9% | 1.57% | 5am–8am, Tue | UA 635 06:00 |
| 2. BDL → BWIHartford to Baltimore | Southwest Airlines | 81.5% | 82.9% | 1.71% | 5am–8am, Wed | — |
| 3. BDL → DCAHartford to Washington | Republic Airways | 67.6% | 70.0% | 3.37% | 5am–8am, Sat | — |
| 4. BDL → DCAHartford to Washington | PSA Airlines | 65.6% | 70.2% | 6.58% | 5am–8am, Tue | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 29 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am425 flights93.8%
- 8am–11am350 flights93.0%
- 11am–2pm393 flights78.8%
- 2pm–5pm434 flights73.8%
- 5pm–8pm154 flights64.9%
- 8pm–5am—
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 64.9% on time, against 93.8% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 434 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 23 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 67.8% on time, against 90.9% in May. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. July was the busiest month here, with 158 flights.
Across the week, Wednesday is the strongest day at 87.9% on time and Monday the weakest at 78.6%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 16,000 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.
- 53%Late-arriving aircraft
- 24%National Airspace System
- 22%Carrier
- 1%Extreme weather
- 0%Security
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 16,000 reported delay minutes here, that single category outweighs weather by 53 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 16,421 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.8% on time here.
Cancellations sit at 1.71% against a national 1.81%, which is ordinary. Diversions add another 0.17%.
Connections and stage length
What a delay here actually costs
Badly late arrivals are rare here: only 3.9% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 283 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg runs 81.8% on time across 1,754 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,756 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in BWI after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 90.9% on time and December 67.8%, a swing of 23 points. If the dates move at all, move them out of December before you think about anything else. 1,723 completed flights over 12 months sit behind that.
Common questions
BDL to BWI questions
How often is BDL to BWI delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 17.1% of the 1,756 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
How reliable is BDL to BWI compared with the rest of the country?
82.9% of flights arrive on time here against a national 77.6%, a difference of 5 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on BDL to BWI?
The 5am–8am departure window is the strongest at 93.8% on time. The 5pm–8pm window is the weakest at 64.9%, 29 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on BDL to BWI?
December is the weakest month at 67.8% on time, compared with 90.9% in May. Across the year that is 23 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- BWI to BDL — the return legseparate record
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- BDL to ORD, a related route74.0%
- ATL to BWI, a related route75.6%
- BDL to ATL, a related route83.4%
- Southwest Airlines on-time record82.9%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. BDL to BWI and BWI to BDL are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.