Departure
Scheduled departure: 2026-10-29 17:45 (UTC-04:00). Confirm airport transport and terminal opening hours in advance.
WN420 Buffalo Niagara International Airport to Baltimore/Washington International Thurgood Marshall Airport nonstop flight: schedule, airports, aircraft and travel guide.
WN420 Flight Overview
WN420 is operated by and connects Buffalo Niagara International Airport (BUF) and Baltimore/Washington International Thurgood Marshall Airport (BWI). Scheduled departure: 2026-10-29 17:45 (UTC-04:00); scheduled arrival: 2026-10-29 18:55 (UTC-04:00).
AirlineSouthwest Airlines
Flight numberWN420
RouteBUF to BWI
Scheduled duration1 hr 10 min
Buffalo to Baltimore Route Information
WN420 is a nonstop flight from Buffalo Niagara International Airport (BUF) to Baltimore/Washington International Thurgood Marshall Airport (BWI). Use the information below to plan your journey.
Route distanceApprox. 451 km
Scheduled flight time1 hr 10 min
Time difference0 min
Flight typenonstop
Arrival
Scheduled arrival: 2026-10-29 18:55 (UTC-04:00). Arrange pickup, hotel and onward transport for the arrival date.
Time zones
Departure: Buffalo (UTC-04:00); arrival: Baltimore (UTC-04:00).
WN420 On-time Performance & History
Methodology
Arrival on-time rate
Sample flights-
Average departure delay-
Average arrival early-
Cancllation rate-
Longest delay-
Early arrivals-
Historical statistics are for reference only and do not predict future flight performance.
Aircraft, Cabin & Services
Based on currently published aircraft and cabin information; the operating aircraft may change.
Published aircraft type
Boeing 737MAX 8 Passenger
31 inches
Seat configuration depends on the operating aircraft
Availability and fees depend on the flight
WN420 Airports
Terminals follow the published schedule; check official airline channels for same-day gates and operations.
BUFBuffalo Niagara International Airport
Buffalo, United States · UTC-04:00
- Departure terminal
- Check-in counter
- Announced on the day
BWIBaltimore/Washington International Thurgood Marshall Airport
Baltimore · UTC-04:00
- Arrival terminal
- Baggage belt
- Announced on the day
Buffalo Niagara International Airport Departure & Baltimore/Washington International Thurgood Marshall Airport Arrival Guide
Departure date: 2026-10-29. Terminal and arrival information helps plan your journey.
Departing from Buffalo Niagara International Airport
WN420 is scheduled to depart from . Allow time for international check-in, baggage drop, security and immigration.
Arriving at Baltimore/Washington International Thurgood Marshall Airport
Scheduled arrival is at . After immigration, take the MRT, taxi, ride-hailing service or airport bus to the city.
Planning your arrival
Scheduled arrival: 2026-10-29 18:55. Use the arrival date when booking hotels and pickup services.
Flight Changes, Cancellations & Missed Flights
If the schedule or aircraft changes, follow the booking channel and operating carrier rules.
Schedule changes
After an airline or booking-platform notice, confirm the new date, terminal and connecting transport.
Cancellation and changes
Refund, rebooking and involuntary-change rules depend on the booking channel, fare conditions and airline notice.
Missed flight
If you may not reach the airport on time, contact the booking channel or airline quickly to protect later sectors.
Check-in, Baggage & Entry Tips
International check-in deadlines, baggage allowance and entry requirements may vary by fare and traveller.
Arrive early for check-in
Arrive at least 3 hours before departure. Counter opening times and online check-in rules follow Buffalo Niagara International Airport guidance.
Check baggage allowance
Checked and carry-on baggage allowances depend on cabin, fare rules and membership tier. See the baggage terms in your booking.
Prepare entry documents
Before departure, check passport validity, visa or visa-free eligibility, andBaltimore/Washington International Thurgood Marshall Airport’ latest arrival declaration requirements.
What should I check before flying WN420?
Check the departure date
For an overnight flight, check the departure date on your ticket and plan airport transport in advance.
Confirm the operating carrier
Follow the airline rules shown in your booking for check-in and checked baggage.
Check boarding information
Gates and operating times may change; follow airline notices and airport displays.
Popular route recommendations
WN420 Frequently Asked Questions
Which airline operates this flight?
WN420 is operated by Southwest Airlines.
Where does it depart and arrive?
Buffalo Niagara International Airport (BUF) → Baltimore/Washington International Thurgood Marshall Airport (BWI).
What are the departure and arrival times?
Scheduled departure 17:45, arrival 18:55 · 1 hour 10 minutes.
Which terminal is used for check-in?
Departure terminal No data, arrival terminal No data. Check-in, gate and baggage belt are announced on the day.
Are meals and inflight entertainment available?
No data
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