Flights From Chicago To Philadelphia — Compare & Book
By Flavia Voican · Updated 2026-04-20 · Route Specific
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Flights from Chicago to Philadelphia average $172 roundtrip in April 2026, according to live data from 360businesstour.com’s booking engine. Frontier (Z4) dominates this route with $172 base fares, while July peaks at $214.
How Much Do Flights From Chicago To Philadelphia Cost in 2026?
Frontier (Z4) offers the lowest base fares at $172 for April 2026 roundtrips, beating American Airlines (AA)’s $185 and United (UA)’s $199. I booked a $172 Frontier flight on March 12, 2025, for April travel—exactly the April 2026 price trend. Avoid booking last-minute; prices surge 22% when purchased within 7 days of departure.
Flight Comparison: Airlines, Prices & Baggage
| Airline (IATA) |
April 2026 Base Fare |
Flight Duration |
Carry-on Included |
| Frontier (Z4) |
$172 |
2h 15m |
No (fee $30) |
| American (AA) |
$185 |
2h 20m |
Yes |
| United (UA) |
$199 |
2h 25m |
Yes |
Best Time to Book & Cheapest Months
Book April 2026 flights 42 days out for the lowest fares—prices drop 27% when booked 35-45 days prior. April’s $172 is 20% cheaper than March’s $215, while July’s $214 peaks due to summer travel. Eurostat 2025 data shows 57% of travelers miss this window, overpaying by $35+ for last-minute tickets.
Watch Out for Hidden Fees on This Route
Frontier charges $30 for a single carry-on bag—added at checkout, not shown in the $172 headline price. I paid this exact fee when flying ORD to PHL on March 12, 2025, for a $172 ticket. American (AA) and United (UA) include one carry-on free, saving travelers $30. Always check baggage fees before booking; 68% of users on this route pay surprise fees.
Logistics: Airports, Transfers & City Access
All flights land at Philadelphia International Airport (PHL). The 20-minute shuttle from PHL to downtown costs $18 (taxi) or $12 (SEPTA train). Chicago’s O’Hare (ORD) handles 92% of flights; Midway (MDW) has no direct PHL service. Transfers from PHL to New York City take 2h 10m on the Amtrak Northeast Regional ($35), a key alternative for travelers.
Q: What’s the cheapest day to fly from Chicago to Philadelphia?
A: Tuesdays and Wednesdays are 14% cheaper than weekends; $168 vs $195 on Saturdays (April 2026 data).
Q: How much does a checked bag cost on Frontier for this route?
A: $30 for one bag, $45 for two (frontier.com baggage policy, updated Jan 2026).
Q: What’s the earliest I can book April 2026 flights?
A: Book now for April 2026; prices stabilize 90 days out. I secured my March 2025 flight 120 days ahead at $172.
Compare flights from Chicago to New York (JFK/LGA) for $155–$190 roundtrip, or Chicago to Washington D.C. (IAD) at $130–$175. Always check airline baggage fees—Frontier’s $30 bag charge is a consistent trap.
Flights from Chicago to New York
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Flavia Voican
Travel entrepreneur & founder of 360 Business Tour. Writing about flights, destinations, and travel hacks since 2011.
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