Fare Guide

Estimated lowest fares found within 7 days

Cheapest Airline Frontier Airlines

The cheapest airline(s) flying from Chicago to Philadelphia is Frontier Airlines.

  • Frontier Airlines Frontier Airlines
  • Sun Country Airlines Sun Country Airlines
  • Spirit Airlines Spirit Airlines
  • American Airlines American Airlines
  • United Airlines United Airlines
  • Southwest Airlines Southwest Airlines
  • JetBlue Airways JetBlue Airways
Cheapest Month February

Travel Period: February 2025 - January 2026

The cheapest month(s) to fly from Chicago to Philadelphia is February.

  • Feb 2025
  • Mar 2025
  • Apr 2025
  • May 2025
  • Jun 2025
  • Jul 2025
  • Aug 2025
  • Sep 2025
  • Oct 2025
  • Nov 2025
  • Dec 2025
  • Jan 2026
Cheapest Day of the Week Sunday

The cheapest day(s) of the week to fly from Chicago to Philadelphia is Sunday.

  • Sun Sunday
  • Mon Monday
  • Tue Tuesday
  • Wed Wednesday
  • Thu Thursday
  • Fri Friday
  • Sat Saturday
What’s the most popular airline flying from Chicago to Philadelphia?

The most popular airline flying from Chicago to Philadelphia is American Airlines. Find the latest flight deals on Wego.

How far is Philadelphia from Chicago?

The flight distance between Chicago and Philadelphia is 1069km. Check all available flights on Wego.