Flight number record

DL 1103

Delta Air Lines · Boston to Minneapolis

Route: BOS → MSP
Departs: 10:40
Flights: 357
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1103, check with Delta Air Lines.

DL 1103 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 45 minutes. 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 77.6%. That gap is worth roughly 68 fewer late arrivals for every thousand flights.

On time

84.4%

Arrivals under 15 minutes late, of 352 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

1.40%

National rate is 1.81%

1 hour+ late

2.8%

National rate is 8.1%

These figures cover 357 flights between July 2025 and June 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.

Schedule

When DL 1103 flies

DL 1103 flies BOS to MSP without a single fixed slot. Its most common scheduled departure was 10:40, used on 53 of 357 flights, with 11:15 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:4053 flights14.8%
Departs 11:1539 flights10.9%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:40 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1103 runs level with that at 84.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1103 next to BOS to MSP

Every carrier on BOS to MSP combined arrived on time 83.1% of the time across 1,851 flights, so DL 1103 is about level with it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 1103 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1103thin sample	357	84.4%	45 min	1.40%	B
All Delta Air Lines on BOS–MSP	1,851	83.1%	63 min	1.19%	B
All carriers on BOS–MSP	1,851	83.1%	63 min	1.19%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 89 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 202592 flights83.7%
Oct–Dec 202587 flights78.2%
Jan–Mar 202687 flights81.7%
Apr–Jun 202691 flights93.4%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1103 ranged from 79.2% on Sunday to 88.5% on Wednesday. With about 51 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

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 2,446 reported delay minutes.

Carrier
38%
Late-arriving aircraft
38%
National Airspace System
24%
Extreme weather
0%

38% 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 2,446 reported delay minutes here, that single category outweighs weather by 38 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 2,446 delay minutes reported on DL 1103.

Cancellations sit at 1.40% against a national 1.81%, 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 2.8% 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.

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. 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.

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 84.4% on time with 1.40% cancelled over 357 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures