$248 Cheap flights from O'Hare Intl. to Dublin (ORD to DUB)

Start your escape in the most relaxed way possible and jet straight to Dublin Airport from O’Hare Airport. Aer Lingus and American Airlines are among the airlines that operate direct services on this flight path.

The travel time between O’Hare Intl. Airport (ORD) and DUB is usually around 11 hours and 42 minutes — long enough to affect anyone’s body clock. Think about the time difference and get as much shut-eye as you can on the flight to prevent jet lag.

From O’Hare Intl. Airport (ORD) to Dublin Airport (DUB), the flight distance is 3,700 mi. It’s a long journey, so make sure you pack your carry-on basics. Some noise-canceling earphones and a pullover are terrific items to start with.

There are a number of airlines advertising direct flights from ORD to Dublin Airport (DUB). Aer Lingus (EI) is among the best of them, and operates roughly 30 flights each month. Another possibility is American Airlines (AA), which offers 30 flights every month. The more air carriers you consider, the more likely you are to score a fantastic deal.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity 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 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.