Cheap Flights From Denver Intl. (DEN) To O'Hare Intl. (ORD)

If you're planning a trip from Denver to Chicago, there is a good range of airlines that'll fly you there. Pick out a flight from these top carriers offering direct flights from DIA airport to O'Hare Airport:

• United Airlines - (UA) with 273 flights every month
• Southwest Airlines - (WN) with 173 flights every month
• American Airlines - (AA) with 139 flights every month
• Frontier Airlines - (F9) with 30 flights every month

Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.