Baltimore to Philadelphia BWI → PHL
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Philadelphia International Airport (PHL)
The cheapest one-way found recently is $154 with Frontier Airlines, 27 Oct, found 2 days ago.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $105 to $254.
Cheapest one-way found recently
$154
27 Oct · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Philadelphia International Airport (PHL)
Leaves 10:54 a.m. · 18 h 17 min trip
2 stops
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$154 27 Octfound 2 days agoOpen this trip
$55 10 Novfound 6 days agoOpen this trip
What have prices looked like?
Over 15 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $55 to $81.
At $154, the cheapest one-way found recently is above that range.
15 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 27 Oct to 29 Nov, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 27 Oct to compare.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 27 Oct | $154 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Philadelphia International Airport (PHL) | 2 stops | found 2 days ago | Open this trip |
| 10 Nov | $55 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Philadelphia International Airport (PHL) | 1 stop | found 6 days ago | Open this trip |
| 29 Nov | $353 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Philadelphia International Airport (PHL) | 1 stop | found 6 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $55.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Baltimore to Philadelphia
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 27 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Baltimore to Philadelphia?
One-way
The cheapest fares were 14 to 29 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (15 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $55 | $55 | Cheapest seen | 7 |
| 30–59 days | $57 | $57 | +4% | 9 |
| 90–179 days | $82 | $82 | +49% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Baltimore → New York
130 km from Philadelphia
$962
21 Jun 2027 – 4 Jul 2027 · BWI → LGA · out 1 stop, back nonstop
found today
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Washington → Philadelphia
57 km from Baltimore
$68
$86 less than flying from Baltimore
10 Nov · IAD → PHL · 1 stop
found 6 days ago
Baltimore → New York
130 km from Philadelphia
$244
$90 more than flying to Philadelphia
15 Feb 2027 · BWI → LGA · 1 stop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 27 Oct. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work