Ryanair says it carried 7.6 million passengers in July, beating its previous monthly record set in August last year.
The July figure was up 13% on the same month last year. But the load factor, or percentage of seats filled, edged down one point to 88%.
Ryanair carried just over 70 million passengers in the 12 months to July, also a record.
When it released first quarter results last month, Ryanair said it remained cautious about the outlook for the rest of the year, expecting average fares to rise by 10% to 15% in its second quarter. But it said it had 'no visibility' on the coming winter.
BA passenger numbers dip in July
British Airways carried just under 3.2 million passengers last month - a fractionally lower figure than the 3.21 million who flew with the airline in July 2009, it was announced today.
There was a 13.6% dip last month in Asia/Pacific traffic, while numbers on North and South American routes fell 1.7%.
But there was a rise of 0.9% in UK and Europe traffic in July 2010 and a similar increase on African and Middle Eastern routes. BA planes flew 84% full last month compared with 84.6% in July 2009.
A spokesman for Unite said the figures showed BA was still being affected by the industrial dispute with its cabin crew, which has seen workers take 22 days of industrial action since March.
'July was the first month that no strikes were held since the strikes started, and BA had launched a big sale of tickets so the airline obviously believed it was going to increase passenger numbers.
The dispute remains deadlocked despite fresh peace talks on Monday and another meeting next week, with the continued threat of further strikes later in the year.