Flight number record

B6 394

JetBlue Airways · Denver to Boston

Route: DEN → BOS
Departs: 13:33
Flights: 309
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s B6 394, check with JetBlue Airways.

B6 394 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 309 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so B6 394 runs 9 points behind the country as a whole. Across a thousand flights that is about 94 extra late arrivals.

On time

68.2%

Arrivals under 15 minutes late, of 302 completed flights

Avg delay

86 min

Across delayed arrivals only, not all flights

Cancelled

2.27%

National rate is 1.81%

1 hour+ late

16.6%

National rate is 8.1%

These figures cover 309 flights between July 2025 and June 2026. Beyond the headline rate, 16.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When B6 394 flies

B6 394 flies DEN to BOS without a single fixed slot. Its most common scheduled departure was 13:33, used on 64 of 309 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:3364 flights20.7%

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 13:33 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and B6 394 runs 11 points worse at 68.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

B6 394 next to DEN to BOS

Every carrier on DEN to BOS combined arrived on time 71.4% of the time across 3,903 flights, so B6 394 is 3 points behind it. JetBlue flew 682 flights on the same city pair under all its flight numbers, including this one, and those ran 68.6% on time. Across its whole network JetBlue Airways managed 72.7%, which this flight trails by 5 points.

B6 394 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
B6 394thin sample	309	68.2%	86 min	2.27%	C
All JetBlue Airways on DEN–BOS	682	68.6%	82 min	2.05%	C
All carriers on DEN–BOS	3,903	71.4%	70 min	1.18%	C
JetBlue Airways, whole network	234,468	72.7%	76 min	2.56%	C

Across the year

B6 394 quarter by quarter

Quarter by quarter B6 394 held fairly steady: 72.5% in Jul–Sep 2025, 67.5% in Oct–Dec 2025, 67.1% in Jan–Mar 2026 and 63.5% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights72.5%
Oct–Dec 202581 flights67.5%
Jan–Mar 202684 flights67.1%
Apr–Jun 202652 flights63.5%

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, B6 394 did best on Saturday at 78.8% on time and worst on Monday at 60.5%. Each day rests on about 44 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why B6 394 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 8,276 reported delay minutes.

National Airspace System
41%
Carrier
33%
Late-arriving aircraft
27%
Extreme weather
0%

41% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,354 minutes out of 8,276, against a national NAS share of 21%. The split is drawn from 8,276 delay minutes reported on B6 394.

Cancellations sit at 2.27% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.6% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 1,754 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

Every one of the 309 flights under B6 394 in the data flew DEN to BOS. 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. 309 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 B6 394

For a booking, B6 394 is a flight to put a long connection behind. 16.6% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

Where to go next

A flight number here means JetBlue Airways’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