Flight number record
DL 2303
Delta Air Lines · Boston to Minneapolis
- Route
- BOS → MSP
- Departs
- 05:50
- Flights
- 353
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2303, check with Delta Air Lines.
DL 2303 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 353 flights, with a median arrival 13 minutes early.
Set against the rest of the country, DL 2303's record is 16 points better than the US average of 77.3%. That gap is worth roughly 163 fewer late arrivals for every thousand flights.
Key figures
On time
93.6%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
91 min
Across delayed arrivals only, not all flights
Cancelled
1.98%
National rate is 1.89%
1 hour+ late
2.6%
National rate is 8.3%
These figures cover 353 flights between September 2025 and August 2026. The median arrival is 13 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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Schedule
When DL 2303 flies
DL 2303 flies BOS to MSP without a single fixed slot. Its most common scheduled departure was 05:50, used on 133 of 353 flights, with 05:45 (88 flights) and 05:51 (60 flights) next.
- Departs 05:50133 flights37.7%
- Departs 05:4588 flights24.9%
- Departs 05:5160 flights17.0%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 05:50 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2303 runs 4 points better at 93.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2303 next to BOS to MSP
Every carrier on BOS to MSP combined arrived on time 82.0% of the time across 1,853 flights, so DL 2303 is 12 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2303thin sample | 353 | 93.6% | 91 min | 1.98% | A |
| All Delta Air Lines on BOS–MSP | 1,853 | 82.0% | 70 min | 1.35% | B |
| All carriers on BOS–MSP | 1,853 | 82.0% | 70 min | 1.35% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2303 quarter by quarter
DL 2303 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jul–Sep 2026 at 87.1%, a swing of 13 points on roughly 71 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights100.0%
- Oct–Dec 202592 flights93.4%
- Jan–Mar 202678 flights91.7%
- Apr–Jun 202691 flights97.8%
- Jul–Sep 202662 flights87.1%
Scale runs 80% to 100%.
By weekday, DL 2303 ranged from 87.2% on Monday to 98.1% on Thursday. With about 50 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2303 runs when it is late
DL 2303 often beats the schedule: 156 of 346 completed flights, 45%, arrived 15 minutes or more early. The 22 late arrivals split 10 under half an hour, 3 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early156 flights45.1%
- Within 15 min168 flights48.6%
- 15–29 min late10 flights2.9%
- 30–59 min late3 flights0.9%
- 1–2 hours late3 flights0.9%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 346 completed flights by arrival against schedule.
Only 13 of 346 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 2303
The latest arrival of the period was on 4 May 2026, 8 hours 7 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 May 2026 | 8 hours 7 minutes | Carrier |
| 5 June 2026 | 4 hours 57 minutes | Carrier |
| 7 July 2026 | 3 hours 21 minutes | Carrier |
| 22 July 2026 | 2 hours 42 minutes | Carrier |
| 15 December 2025 | 2 hours 35 minutes | Carrier |
Delay causes
Why DL 2303 runs late
Carrier accounts for 86% of the 2,001 delay minutes carriers reported here, and the remaining four split what is left.
- 86%Carrier
- 14%National Airspace System
The largest share of delay minutes, 86%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,716 of the 2,001 delay minutes reported here. The split is drawn from 2,001 delay minutes reported on DL 2303.
Cancellations sit at 1.98% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.6% land an hour or more behind schedule, against 8.3% 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.
The 1,124 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.
Every one of the 353 flights under DL 2303 in the data flew BOS to MSP. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 353 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 DL 2303
For a booking, read DL 2303 as 93.6% on time with 1.98% cancelled over 353 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to MSP, every carrier and departure
- MSP to BOS, the return direction
- Delta Air Lines 1127 on the same route72.7%
- Delta Air Lines 1098 on the same route70.6%
- Delta Air Lines 1103 on the same route83.8%
- Boston Logan International (BOS) delay statistics
- Minneapolis-St Paul International (MSP) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.