Carrier route record
F9FLL→BWI
Frontier Airlines · Fort Lauderdale to Baltimore
- Flights
- 198
- Period
- September 2025 to August 2026
- Share of route
- 6%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on FLL to BWI draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 198 flights. The strongest carrier on the route with a full sample, Southwest Airlines, flew 2,106 at 73.5% on time.
The national on-time rate over the same period is 77.3%, so Frontier on FLL to BWI runs 11 points behind the country as a whole. Across a thousand flights that is about 105 extra late arrivals.
Key figures
On time
66.8%
Arrivals under 15 minutes late, of 190 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
4.04%
National rate is 1.89%
Whole route
71.0%
Every carrier on FLL to BWI, 3,150 flights
These figures cover 198 flights between September 2025 and August 2026. Beyond the headline rate, 12.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Frontier against every carrier on FLL to BWI
Frontier flew 198 of the 3,150 flights on FLL to BWI, about 6% of it. Its 66.8% on time is 4 points worse than the route as a whole, which runs 71.0%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Southwest at 73.5% to JetBlue at 47.1%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 | 2,106 | 73.5% | 58 min | 2.18% | C |
| Spirit Airlines | 684 | 70.1% | 69 min | 4.68% | C− |
| Frontier Airlines (this page)thin sample | 198 | 66.8% | 88 min | 4.04% | C− |
| JetBlue Airwaysthin sample | 162 | 47.1% | 84 min | 5.56% | F− |
Spirit Airlines cancels 4.7% 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.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against 3 points between the best and worst carrier.
- 5am–8am56 flights81.8%
- 8am–11am99 flights66.7%
- 11am–2pm11 flights—
- 2pm–5pm12 flights—
- 5pm–8pm3 flights—
- 8pm–5am17 flights—
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 81.8% of the time, against 66.7% for the morning window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 99 flights scheduled in it.
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%
- Jul–Sep 202662 flights58.1%
Scale runs 50% 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 66.8% on time across 198 flights.
Frontier on FLL to BWI did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.9% on time and its weakest Jul–Sep 2026 at 58.1%, a swing of 21 points on roughly 66 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.
Across the week, Thursday is the strongest day at 69.4% on time and Sunday the weakest at 59.0%, a spread of 10 points.
Arrival by arrival
How late Frontier on FLL to BWI runs when it is late
The 63 late arrivals split 23 under half an hour, 16 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early40 flights21.1%
- Within 15 min87 flights45.8%
- 15–29 min late23 flights12.1%
- 30–59 min late16 flights8.4%
- 1–2 hours late8 flights4.2%
- 2+ hours late16 flights8.4%
Scale runs 0% to 100%.
Share of 190 completed flights by arrival against schedule.
9 of 61 late departures made up the time and arrived on time, 15% of them. In the other direction, 11 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BWI.
The worst days
Worst days for Frontier on FLL to BWI
The latest arrival of the period was on 15 January 2026, 10 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 January 2026 | 10 hours 43 minutes | Carrier |
| 21 December 2025 | 6 hours 48 minutes | Late-arriving aircraft |
| 1 January 2026 | 4 hours 58 minutes | Late-arriving aircraft |
| 22 July 2026 | 4 hours 41 minutes | Carrier |
| 29 August 2026 | 3 hours 57 minutes | Late-arriving aircraft |
Delay causes
Why Frontier runs late on this route
Late-arriving aircraft accounts for 53% of the 5,521 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 37%Carrier
- 11%National Airspace System
- 0%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,521 reported delay minutes here, that single category outweighs weather by 53 to one. The split is drawn from 5,521 reported delay minutes.
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,025 of the 5,521 delay minutes reported here.
Cancellations run at 4.04%, against 1.89% nationally. That is about one flight in 25 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
12.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
The return leg is a different operation and performs like one: it runs 51.3% on time across 197 flights, 16 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 16 points of difference.
One caution: this is a thin sample. 198 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 4.04% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 190 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 BWI73.5%
- Spirit Airlines on FLL to BWI70.1%
- JetBlue Airways on FLL to BWI47.1%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.