Carrier route record
F9FLL→BWI
Frontier Airlines · Fort Lauderdale to Baltimore
- Flights
- 136
- Period
- July 2025 to June 2026
- Share of route
- 4%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on FLL to BWI sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 136 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 2,119 at 74.2% on time.
The national on-time rate over the same period is 77.6%, so Frontier on FLL to BWI runs 7 points behind the country as a whole. Across a thousand flights that is about 65 extra late arrivals.
Key figures
On time
71.1%
Arrivals under 15 minutes late, of 128 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
5.88%
National rate is 1.81%
Whole route
73.2%
Every carrier on FLL to BWI, 3,101 flights
These figures cover 136 flights between July 2025 and June 2026. Beyond the headline rate, 11.7% 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.
Carrier by carrier
Frontier against every carrier on FLL to BWI
Frontier flew 136 of the 3,101 flights on FLL to BWI, about 4% of it. Its 71.1% on time is 2 points worse than the route as a whole, which runs 73.2%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Southwest at 74.2% to Spirit at 70.8%.
The two carriers here are closely matched: 3 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 2,119 | 74.2% | 56 min | 2.08% | C |
| Frontier Airlines (this page)thin sample | 136 | 71.1% | 93 min | 5.88% | C− |
| Spirit Airlines | 846 | 70.8% | 67 min | 4.02% | C− |
Spirit Airlines cancels 4.0% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
When Frontier runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 136 flights.
- 5am–8am56 flights81.8%
- 8am–11am37 flights82.4%
- 11am–2pm11 flights—
- 2pm–5pm12 flights—
- 5pm–8pm3 flights—
- 8pm–5am17 flights—
Scale runs 75% to 90%. Rows with fewer than 30 flights show a dash.
The 8am–11am window is the strongest at 82.4% on time. The full set of windows spans half a point.
Across the year
Frontier on FLL to BWI through the year
- Oct–Dec 202515 flights—
- Jan–Mar 202640 flights63.2%
- Apr–Jun 202681 flights78.9%
Scale runs 55% to 85%. 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 71.1% on time across 136 flights.
Split by quarter, Frontier on FLL to BWI logged 15 flights in Oct–Dec 2025, 40 flights in Jan–Mar 2026 and 81 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 71.1% annual figure is the one to use.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 3,453 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.
- 50%Late-arriving aircraft
- 41%Carrier
- 8%National Airspace System
- 0%Extreme weather
50% 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 3,453 reported delay minutes here, that single category outweighs weather by 50 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 3,453 reported delay minutes.
The largest share of delay minutes, 41%, 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 1,429 of the 3,453 delay minutes reported here.
Cancellations run at 5.88%, against 1.81% nationally. That is roughly one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.7% 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.
The 925 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.
The return leg is a different operation and performs like one: it runs 61.6% on time across 135 flights, 9 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 9 points of difference.
One caution: this is a thin sample. 136 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 Frontier on FLL to BWI
Put together: the delay figures matter less here than the 5.88% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 128 completed flights over 12 months sit behind that.
Related
Where to go next
- FLL to BWI, every carrier
- Frontier on BWI to FLL, the return leg
- Southwest Airlines on FLL to BWI74.2%
- Spirit Airlines on FLL to BWI70.8%
- Frontier Airlines network-wide record
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.