DUBAI, May 21 (Reuters) - Dubai's main airport expects to handle a record passenger traffic this year after an 8.4% rise in the first quarter compared with a year earlier, operator Dubai Airports said on Tuesday.

Dubai International Airport (DXB), a major global travel hub, welcomed around 23 million passengers in the January-March period, the operator said in a statement, noting that the uptick was partly driven by increased destination offers by flagship carrier Emirates and its sister low-cost airline Flydubai.

"With a strong start to Q2 and an optimistic outlook for the rest of the year, we have revised our forecast for the year to 91 million guests, surpassing our previous annual traffic record of 89.1 million in 2018," CEO Paul Griffiths said in the statement.

Dubai is the biggest tourism and trade hub in the Middle East, attracting a record 17.15 million international overnight visitors last year.

Its ruler Sheikh Mohammed bin Rashid al-Maktoum last month approved a new passenger terminal in Al Maktoum International airport worth 128 billion dirhams ($34.85 billion).

The Al Maktoum International Airport will be the largest in the world with a capacity of up to 260 million passengers, and five times the size of DXB, he said, adding all operations at Dubai airport would be transferred to Al Maktoum in the coming years.

DXB is connected to 256 destinations across 102 countries. In the first quarter, India, Saudi Arabia and Britain were the top three countries by passenger numbers, Dubai Airports added. ($1 = 3.6729 UAE dirham) (Reporting by Federico Maccioni, Editing by Subhranshu Sahu)