Flight number record
DL 1103
Delta Air Lines · Boston to Minneapolis
- Route
- BOS → MSP
- Departs
- 11:50
- Flights
- 357
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1103, check with Delta Air Lines.
DL 1103 lands a B, 7 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 about an hour on average. That rests on 357 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 1103's record is 7 points better than the US average of 77.3%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.
Key figures
On time
83.8%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
1.40%
National rate is 1.89%
1 hour+ late
3.7%
National rate is 8.3%
These figures cover 357 flights between September 2025 and August 2026. The median arrival is 10 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 1103 flies
DL 1103 flies BOS to MSP without a single fixed slot. Its most common scheduled departure was 11:50, used on 61 of 357 flights, with 10:40 (53 flights) next.
- Departs 11:5061 flights17.1%
- Departs 10:4053 flights14.8%
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 11:50 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1103 runs 6 points better at 83.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1103 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 1103 is 2 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1103thin sample | 357 | 83.8% | 59 min | 1.40% | B |
| 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 1103 quarter by quarter
DL 1103 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.4% on time and its weakest Oct–Dec 2025 at 78.2%, a swing of 15 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 flights83.3%
- Oct–Dec 202587 flights78.2%
- Jan–Mar 202687 flights81.7%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights80.6%
Scale runs 70% to 100%.
By weekday, DL 1103 ranged from 79.2% on Sunday to 86.5% on Wednesday. With about 51 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1103 runs when it is late
DL 1103 often beats the schedule: 128 of 352 completed flights, 36%, arrived 15 minutes or more early. Most of the lateness is short. 30 of the 57 late arrivals were under half an hour behind, and 13 reached an hour or more.
- 15+ min early128 flights36.4%
- Within 15 min167 flights47.4%
- 15–29 min late30 flights8.5%
- 30–59 min late14 flights4.0%
- 1–2 hours late6 flights1.7%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
6 of 46 late departures made up the time and arrived on time, 13% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for DL 1103
The latest arrival of the period was on 22 July 2026, 6 hours 5 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Four of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 July 2026 | 6 hours 5 minutes | Carrier |
| 31 July 2026 | 4 hours 33 minutes | Late-arriving aircraft |
| 7 July 2026 | 3 hours 43 minutes | Carrier |
| 23 July 2026 | 3 hours 33 minutes | Late-arriving aircraft |
| 18 April 2026 | 3 hours 29 minutes | Carrier |
Delay causes
Why DL 1103 runs late
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 3,341 reported delay minutes.
- 41%Carrier
- 31%Late-arriving aircraft
- 27%National Airspace System
- 0%Extreme weather
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,380 of the 3,341 delay minutes reported here. The split is drawn from 3,341 delay minutes reported on DL 1103.
Cancellations sit at 1.40% 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 3.7% 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 357 flights under DL 1103 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. 357 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 1103
For a booking, read DL 1103 as 83.8% on time with 1.40% cancelled over 357 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 2303 on the same route93.6%
- 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.