The Medford airport shattered a six-year-old record last month when 57,926 passengers passed through the gates.
The previous May record was 56,398 set in 2007.
Since 1996, the May record has fallen eight times and the previous seven were followed by multiple record months. Going back to 1978, every record May has been followed by a June record as well.
Last month's total was a 3.4 percent improvement over the 56,035 travelers in 2012, and the 341,968 total through five months is 3.1 percent ahead of 2012.
— Greg Stiles