Flight number record

DL 2151

Delta Air Lines · Minneapolis to Portland

Route: MSP → PDX
Departs: 18:45
Flights: 355
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2151, check with Delta Air Lines.

DL 2151 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land about 50 minutes behind schedule. That rests on 355 flights, with a median arrival 3 minutes early.

On time

74.5%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

0.56%

National rate is 1.81%

1 hour+ late

7.9%

National rate is 8.1%

These figures cover 355 flights between July 2025 and June 2026. The median arrival is 3 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 2151 flies

DL 2151 flies MSP to PDX without a single fixed slot. Its most common scheduled departure was 18:45, used on 114 of 355 flights, with 19:21 (56 flights) and 18:40 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:45114 flights32.1%
Departs 19:2156 flights15.8%
Departs 18:4052 flights14.6%

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 18:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 2151 runs 6 points better at 74.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 2151 next to MSP to PDX

Every carrier on MSP to PDX combined arrived on time 81.6% of the time across 1,512 flights, so DL 2151 is 7 points behind it. Delta flew 1,329 flights on the same city pair under all its flight numbers, including this one, and those ran 81.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 7 points.

DL 2151 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2151thin sample	355	74.5%	50 min	0.56%	C+
All Delta Air Lines on MSP–PDX	1,329	81.1%	52 min	0.45%	B+
All carriers on MSP–PDX	1,512	81.6%	53 min	0.60%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2151 quarter by quarter

DL 2151 did not run the same all year. Its best quarter was Apr–Jun 2026 at 84.5% on time and its weakest Jan–Mar 2026 at 63.6%, a swing of 21 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 flights80.4%
Oct–Dec 202589 flights69.7%
Jan–Mar 202690 flights63.6%
Apr–Jun 202684 flights84.5%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2151 did best on Monday at 82.7% on time and worst on Thursday at 66.7%. Each day rests on about 51 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2151 runs late

One category carries most of the weight here. Carrier accounts for 49% of the 4,482 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.

Carrier
49%
National Airspace System
26%
Late-arriving aircraft
17%
Extreme weather
8%

The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,175 of the 4,482 delay minutes reported here. The split is drawn from 4,482 delay minutes reported on DL 2151.

Cancellations are rare at 0.56%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

7.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 50 minutes, which a normal layover absorbs.

The 1,426 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 355 flights under DL 2151 in the data flew MSP to PDX. 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. 355 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 2151

For a booking, DL 2151 is one of the weaker ways to fly MSP to PDX: 7 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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