Possible delays for WN 455 (BWI→SMF, HOU→ATL, MCO→BWI) as of 6:46 PM ET. It arrived on time 53.1% of the time in June-August 2026. When it was late, the average delay was 1h 5m. 3% of flights were cancelled. MCO has delays (RWY:Disabled Aircraft, 16 minutes to 30 minutes (increasing)).
High cancellation risk
Leg 2 of 3 (HOU → ATL): Should be in the air from HOU, scheduled to land at ATL at 8:20 PM local time. This flight number flew about 4 days a week in June-August 2026, so it may not operate today. Line up a backup option.
3% of its flights were cancelled in June-August 2026; MCO has major delays.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Southwest for official times.
Book a backup seat BWI → BWIThis flight is cancelled often; a refundable backup costs little
What to do now
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| BWI → SMF Baltimore, MD to Sacramento, CA | 8:25 AM → 11:05 AM | 69% |
| HOU → ATL Houston, TX to Atlanta, GA | 5:15 PM → 8:20 PM | 44% |
| MCO → BWI Orlando, FL to Baltimore, MD | 9:55 PM → 12:20 AM | 56% |
Local times. Schedules change; check your booking.
How reliable is WN 455?
| Arrived on time (within 15 min) | 53.1% |
| Average delay when late | 65 min |
| Cancelled | 3% |
| Diverted | 0% |
| Flights tracked | 101 |
Best and worst days to fly WN 455
WN 455 was most reliable on Wednesdays (77% on time) and least reliable on Sundays (25%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Southwest to the Department of Transportation.
Other flights MCO → BWI
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Southwest app.
Southwest delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is WN 455 delayed today?
MCO has delays (RWY:Disabled Aircraft, 16 minutes to 30 minutes (increasing)). Checked 6:46 PM ET. For this flight's gate and exact status, check the Southwest app.
Is WN 455 usually on time?
WN 455 arrived within 15 minutes of schedule 53.1% of the time in June-August 2026, with an average delay of 65 minutes when late.
How often is WN 455 cancelled?
3% of WN 455 flights were cancelled in June-August 2026.