Charleston International Airport (CHS) in North Charleston has grown far beyond a regional hub. Today, it’s a genuine gateway for international travel, offering nonstop flights to key cities outside the United States and seamless connections through major airline networks. Whether you’re heading to a business meeting in Toronto, a vacation in London, or a tropical escape in the Caribbean, understanding the carriers that serve this Lowcountry airport can turn a complicated itinerary into a straightforward journey.

A busy airport terminal at North Charleston South Carolina with several international airplanes parked at gates and passengers moving around the area.

The airport’s international footprint may be smaller than that of mega-hubs like Atlanta or Charlotte, but the airlines operating here have built a strong mix of nonstop, direct, and connecting services. Knowing which carriers reliably fly international routes, how to snag the best fares, and what to expect before you step on the plane will make your next trip smoother and more affordable. Here’s a detailed look at the airlines that earn the title of “best” for international travel from North Charleston.

Understanding Charleston International’s International Network

An aerial view of Charleston International Airport showing multiple international airplanes parked at gates with airport staff and vehicles on the tarmac.

Charleston International Airport is the busiest airport in South Carolina, handling millions of passengers each year. While the majority of its traffic is domestic, international service has expanded measurably in recent years. The airport’s Federal Inspection Station (FIS), which opened in 2016, paved the way for direct international arrivals by allowing passengers to clear U.S. Customs and Border Protection right in North Charleston without first stopping at a larger domestic hub.

Today, you’ll find two airlines operating scheduled nonstop international flights from CHS, while several others offer extensive global connections through their hub networks. This structure means you can fly internationally from Charleston either with a direct ticket or by grabbing a domestic flight that feeds into a larger international gateway — often on the same reservation.

Understanding the difference between nonstop, direct, and connecting flights is essential. A nonstop flight takes you from Charleston to your international destination without any stops or plane changes. A direct flight may have a stop but retains the same flight number — you won’t change planes, but you might spend extra time on the ground. A connecting flight requires a plane change, usually at an airline’s hub. For most international journeys from CHS, you’ll either be on a nonstop flight (to Canada or London) or you’ll connect through a major domestic hub.

Nonstop International Carriers at CHS

Air Canada: Gateway to the North

Air Canada is one of the most established international airlines at Charleston International, offering nonstop flights to Toronto Pearson International Airport (YYZ). This route runs year-round, typically with once-daily service, and is operated by Air Canada Express using comfortable regional jets like the Embraer E175 or similar aircraft. The flight time is roughly two hours, making it a quick hop for business travelers or vacationers looking to explore Canada’s largest city and its connections to Asia, Europe, and beyond.

What sets Air Canada apart is the seamless preclearance experience. When you fly from Toronto to Charleston, you clear U.S. customs in Toronto through a CBP Preclearance facility, so you arrive at CHS as a domestic passenger — meaning no lines at customs after landing. For departures from Charleston, you’ll go through standard TSA screening, but the overall process remains efficient. Air Canada also offers solid in-flight service, free carry-on bags (depending on fare class), access to Star Alliance partnerships, and an easy mileage program (Aeroplan) that can be redeemed for flights all over the world.

If you’re heading beyond Toronto, Air Canada routes you through its YYZ hub to dozens of international destinations — London, Tokyo, Seoul, and São Paulo among them — often on a single ticket with baggage checked through to the final stop.

British Airways operates a seasonal nonstop flight between Charleston and London Heathrow (LHR), one of the most important international hubs in the world. This route typically runs from late spring through early fall, capturing the peak travel window for tourists and business travel alike. The airline deploys its Boeing 787 Dreamliner on the route, featuring a modern cabin, better humidity control, and quieter engines that reduce travel fatigue.

The flight time from CHS to London is about 8 hours 30 minutes eastbound and roughly 9 hours 30 minutes returning due to prevailing winds. Passengers enjoy complimentary meals, beverages, and seatback entertainment even in economy. For those seeking more comfort, the Club World (business class) cabin provides lie-flat seats, premium dining, and access to lounges at both ends.

Arriving at London Heathrow opens up connections to Europe, Africa, the Middle East, and Asia through British Airways’ own network and its oneworld alliance partners. Travelers can check their luggage through to their final destination and often clear customs at Heathrow before connecting, simplifying the overall process. The seasonal nature of the flight means that booking early is key, as seats on this popular route sell out quickly during the summer months.

Connecting to the World via Major Hubs

American Airlines, Delta, and United: The Big Three

While nonstop overseas flights from Charleston are limited, the three largest U.S. carriers — American Airlines, Delta Air Lines, and United Airlines — provide robust international reach through their domestic hubs. Each airline operates multiple daily flights from CHS to cities like Charlotte (CLT), Atlanta (ATL), and Chicago (ORD) or Newark (EWR), where you can pick up hundreds of international departures.

American Airlines uses its Charlotte hub just a short flight away, giving you access to flights to London, Paris, Madrid, and Caribbean destinations. Delta’s Atlanta megahub is one of the busiest international gateways in the world, while United’s Newark and Chicago hubs connect you to Europe, Asia, and Latin America. Booking your entire trip on one ticket through these airlines usually means checked bags go all the way to your final stop, and you’re protected if a connection is missed.

Code-sharing and alliance partnerships further extend your choices. Delta is a member of SkyTeam (with Air France, KLM, and Korean Air), American is part of oneworld, and United belongs to Star Alliance. If you want to fly from Charleston to Tokyo or Cape Town on a single reservation, these carriers make it possible, though you will have a layover along the way.

Low-Cost Carriers: Budget Journeys with Connections

Spirit Airlines, Allegiant Air, and Breeze Airways all have a presence at Charleston International, but their focus is firmly domestic. None of these airlines currently offer nonstop international flights from CHS. However, they can be a useful piece of an international itinerary if you’re willing to stitch together separate tickets — though you should approach this with caution.

Spirit, for example, flies from Charleston to Fort Lauderdale (FLL) and Orlando (MCO), both of which are gateways to the Caribbean and Latin America on other airlines. You could book a cheap Spirit flight to Florida and then switch to a separate international ticket, but you’ll need to collect and recheck your bags, leave time between flights, and accept the financial risk if one leg is delayed. This strategy works best when you build in a long layover or an overnight stop.

The real advantage of low-cost carriers from CHS is for domestic positioning — reaching a major international gateway cheaply before starting your main trip. Just remember that bags, seat assignments, and even carry-on luggage often cost extra, so factor those fees into your comparison.

How to Score the Best International Deals

Timing Your Purchase

International airfares from Charleston fluctuate based on season, day of the week, and how far ahead you book. The best window to book an international flight is generally 2 to 4 months before departure. Last-minute tickets, especially for peak summer travel or winter holidays, can be dramatically more expensive.

If you’re flexible with dates, aim for off-peak months. Late January through early March and late September through early November often yield the lowest fares for transatlantic trips from CHS. Avoid the weeks around Christmas, New Year’s, and the mid-June to mid-August window if you’re looking for a bargain. Midweek departures — Tuesday, Wednesday, and sometimes Thursday — are consistently cheaper than weekend flights.

Using Price Alerts and Comparison Tools

Set up price alerts on platforms like Google Flights, Kayak, or Skyscanner to track fare changes on the exact route you want. These services will email you when prices drop or spike, helping you decide when to book without checking daily. Comparison tools let you see fares across different airlines and booking sites in one screen, so you don’t miss a carrier that might offer a lower price for the same trip.

When searching, always include nearby airports if you’re open to a longer drive. Savannah (SAV) or Myrtle Beach (MYR) can occasionally offer lower international fares, though the convenience of CHS usually outweighs small savings.

Booking Strategies

  • Book round-trip tickets even if you plan on a one-way itinerary; international one-way fares are often disproportionately high. If you must fly one-way, consider using airline miles or booking through a discount consolidator.
  • Search in incognito or private browsing mode to avoid price hikes based on your search history (though this effect is debated, it doesn’t hurt).
  • Check the airline’s own website after finding a deal on an aggregator. Airlines may offer lower ancillary fees or include a free carry-on when you book directly.
  • Consider a “positioning” flight if a nonstop from CHS is too expensive. You might find a much cheaper fare by hopping to a bigger airport and starting your international journey there. Just build in generous layover time.
  • Use airline miles and credit card points strategically. Air Canada’s Aeroplan and British Airways Executive Club are both transfer partners of major flexible reward programs like American Express Membership Rewards or Chase Ultimate Rewards, so a single credit card sign-up bonus could cover a flight from Charleston to Europe in economy or even business class.

What to Expect On Board and At the Airport

Flight Times and Onboard Comfort

Nonstop international flights from Charleston fall into two categories: the short-haul to Toronto (about 2 hours) and the transatlantic to London (8.5 to 9.5 hours). For connecting trips, the total travel time depends on your layover city. A Charleston to Paris trip via Atlanta might take 11 to 13 hours door-to-door, including a 2- to 3-hour layover.

Air Canada’s regional jets offer standard economy seating with snacks and beverages; longer connection flights on Air Canada mainline provide more substantial meal service and seatback screens. British Airways on the London route serves a full meal and a light snack before landing, with free beer, wine, and spirits. The Dreamliner’s cabin pressurization and noise-reducing features make the crossing feel noticeably less taxing than older aircraft. In premium cabins, expect flat-bed seats and higher levels of service that can make an overnight flight genuinely restful.

Airport Amenities and Customs Processing

Charleston International Airport has been steadily improving its facilities. For international travelers, the FIS building means you can arrive directly from overseas and clear customs in a compact, efficient environment rather than facing the long lines of a massive hub. The airport features several dining and shopping options, free Wi-Fi, and comfortable seating areas.

If you hold TSA PreCheck or Global Entry, you’ll move through security and customs even faster. The airport’s location just minutes from downtown Charleston and major interstates makes ground transportation simple, with rideshare, taxis, rental cars, and shuttle services all readily available. Park and fly options include both on-site parking decks and off-site lots with shuttle service, often priced lower than larger airports.

For those with lounge access, Priority Pass holders can use The Club at CHS, which provides complimentary snacks, drinks, and a quiet space to work or relax before boarding. British Airways Club World and certain Air Canada ticket holders may also have lounge access based on fare class or elite status.

Loyalty Programs That Reward International Flyers

Frequent travelers from Charleston can stack value by focusing on a single airline alliance. American Airlines’ AAdvantage program is popular because Charlotte is a short hop away and offers endless oneworld rewards. Delta SkyMiles works well through Atlanta, and United MileagePlus through Newark or Chicago. Accumulating miles with these programs can lead to free international tickets, upgrades, and priority boarding.

Air Canada’s Aeroplan is a strong choice for those who regularly fly the Toronto route, offering generous redemption rates on Star Alliance partners, especially to Asia or South America. British Airways Executive Club uses a distance-based award chart, which can be a bargain for short-haul connections or a splurge for transatlantic business class using Avios points. Many of these programs offer co-branded credit cards or transferable point options, making it easier to earn miles without flying.

When you piece together an international itinerary from CHS, aligning your flights with one alliance not only earns you more miles but also simplifies rebooking if something goes wrong. It’s a small strategic step that can pay off in faster status progression and lower out-of-pocket costs on future trips.

Planning Your Next International Trip from North Charleston

Charleston International may not be the largest airport in the country, but it delivers where it counts: nonstop service to Toronto and London, convenient connections through every major U.S. hub, and an air travel experience that prizes ease over chaos. The “best” international airline for your trip depends on whether you value a nonstop flight to a specific city, a budget-friendly connecting option, or the ability to earn and redeem miles across a global network.

Before you book, check the airport’s official website for the latest route announcements, as new international services occasionally pop up — talk of flights to the Caribbean or additional European destinations surfaces regularly. By comparing carriers, using fare alerts, and embracing the art of the connection, you can turn Charleston into the starting point for an international adventure that feels both effortless and smartly priced.