American Airlines: Often routes BDL to BNA via Charlotte (CLT) or Philadelphia (PHL), with solid connectivity and frequent flights. Good for members of AAdvantage and travelers prioritizing alliance connectivity. Delta Air Lines: Typically connects through Atlanta (ATL) for BDL-BNA itineraries, offering strong on-time performance and SkyMiles benefits; Delta often provides more same-day rebooking options. United Airlines: Commonly connects via Chicago O'Hare (ORD) or Washington D.C. (IAD); MileagePlus and hub options can make United appealing for business travelers. Southwest Airlines: Southwest may offer competitive fares and flexible change policies on some routes near Hartford and to Nashville, but nonstop options are limited. For February travel, compare total journey time, baggage rules, and winter-weather rebooking policies—flexible fares may save stress during New England snow events. CTA: Compare itineraries on airline sites and OTAs, filter by shortest duration or best price for your February dates.