Carrier route record

NKBWI→LAS

Spirit Airlines · Baltimore to Las Vegas

Flights: 181
Period: July 2025 to June 2026
Share of route: 10%
Carriers: 2

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Spirit Airlines.

Spirit on BWI to LAS earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 181 flights, with a median arrival 13 minutes early.

Set against the rest of the country, Spirit's BWI to LAS record is 9 points better than the US average of 77.6%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.

On time

86.1%

Arrivals under 15 minutes late, of 180 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

Whole route

78.9%

Every carrier on BWI to LAS, 1,811 flights

These figures cover 181 flights between July 2025 and June 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.

Carrier by carrier

Spirit against every carrier on BWI to LAS

Spirit flew 181 of the 1,811 flights on BWI to LAS, about 10% of it. Its 86.1% on time is 7 points better than the route as a whole, which runs 78.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Spirit at 86.1% to Southwest at 78.1%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on BWI to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlines (this page)thin sample	181	86.1%	68 min	0.55%	A+
Southwest Airlines	1,630	78.1%	55 min	1.10%	B

Departure window

When Spirit runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am30 flights100.0%
8am–11am67 flights89.6%
11am–2pm1 flights—
2pm–5pm—
5pm–8pm77 flights77.6%
8pm–5am6 flights—

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

Book the early departure. Flights leaving between 5am–8am arrive on time 100.0% of the time, against 77.6% for the evening window. That is 22 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 77 flights scheduled in it.

Across the year

Spirit on BWI to LAS through the year

Jul–Sep 2025114 flights83.2%
Oct–Dec 202567 flights91.0%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 86.1% on time across 181 flights.

Split by quarter, Spirit on BWI to LAS logged 114 flights in Jul–Sep 2025 and 67 flights in Oct–Dec 2025. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 86.1% annual figure is the one to use.

Across the week, Thursday is the strongest day at 96.7% on time and Sunday the weakest at 80.6%. 16 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Spirit runs late on this route

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 1,688 reported delay minutes.

National Airspace System
42%
Late-arriving aircraft
40%
Carrier
11%
Extreme weather
8%

40% 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 1,688 reported delay minutes here, that single category outweighs weather by 5 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 1,688 reported delay minutes.

42% 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 704 minutes out of 1,688, against a national NAS share of 21%.

Cancellations are rare at 0.55%, 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 stage length

What a delay here costs

5.0% 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 an hour, which a normal layover absorbs.

At 2,106 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.

The return leg is a different operation and performs like one: it runs 79.0% on time across 178 flights, 7 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 7 points of difference.

One caution: this is a thin sample. 181 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 Spirit on BWI to LAS

Put together: treat all of this as provisional. 181 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 86.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 180 completed flights over 12 months sit behind that.

Where to go next

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