Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from El Paso to French Polynesia as you normally would.
In terms of precipitation, rainfall in French Polynesia ranges from 1.6 - 13.0 inches per month. January is typically the wettest month, when rainfall can reach 13.0 in. August is typically the driest time to visit French Polynesia when rainfall is around 1.6 in.
If weather is an important factor for your trip to French Polynesia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of May, when temperatures are typically at their lowest (around 77.0 F).