Dayton, Ohio is 3.3 times larger than Valenzuela, Philippines.
Area: 149 km2 calculated
Dayton is the sixth largest city in the U.S. state of Ohio and is the county seat of Montgomery County. Wikipedia
Area: 45 km2 calculated
Valenzuela, officially known as the City of Valenzuela or simply Valenzuela City, is the 119th largest city of the Philippines and one of the 16 cities plus a municipality that compose the region of Metro Manila, located about 14 km north of Manila. Wikipedia