Title: Cheap flights from Marathon to Udon Thani (MTH to UTH) - Expedia.com ![The sea of red lotus, Lake Nong Harn, Udon Thani, Thailand](https://images.trvl-media.com/place/3659/0ee6e6e7-741a-4c70-8980-2f3fdaf5f435.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/3659/0ee6e6e7-741a-4c70-8980-2f3fdaf5f435.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Marathon (MTH) to Udon Thani (UTH) ## Popular airlines from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani (UTH-Udon Thani Intl.) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_B6.svg) JetBlue Airways [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"B6"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.com/Flights-Search?leg1=from:MTH,to:UTH,departure:3/13/2026TANYT&leg2=from:UTH,to:MTH,departure:3/20/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-us-ca.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Vacation Sale Members save up to 40% on hotels and homes. Plan this year’s big trip and save. [Book now](https://expedia.com/deals?rfrr=FTG_SPRING_PROMO_) ## Frequently asked questions ### How much does a flight from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH) cost? ### What is the cheapest month to fly from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH)? ### What is the cheapest airline that flies from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH)? ### How many flights per day from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH)? ### What day of the week has the most flights from MTH to UTH? ### What is the best time to fly from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH)? ### Is it cheaper to buy a plane ticket from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH) last-minute? ### Is it cheaper to book a MTH to UTH flight and hotel package? ### Can I cancel or change the date of my flight from Marathon, FL (MTH-Florida Keys Marathon) to Udon Thani Intl. Airport (UTH)? ## Travel information | Origin airport | Florida Keys Marathon | | ------------------- | --------------------- | | Destination airport | Udon Thani Intl. | | Distance | 9515 mi | ## Book with confidence # Marathon to Udon Thani Flights The cheapest times to fly from Marathon to Udon Thani On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Marathon to Udon Thani are during the month of . You can find some of the cheapest flights from Marathon to Udon Thani with Expedia's search tool and vast selection of airlines. The best time to book a flight from Marathon to Udon Thani Sunday is one of the best days to book for cheap flights from Marathon to Udon Thani: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance. How to find cheap round-trip tickets from Marathon to Udon Thani Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Marathon to Udon Thani in 2026\. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference\*. This is available for a small fee, and is free to One Key Gold and Platinum tier members. Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Marathon to Udon Thani flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps. You could also save big by booking one of Expedia's [vacation packages](https://www.expedia.com/package-deals). Bundling together your Marathon to Udon Thani airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures. \*Terms apply. Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023\. The percentages you see are averages. \*Flight schedules are subject to change. ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rentals - Other - [Hotels near Udon Thani Rajabhat University ](https://www.expedia.com/Udon-Thani-Rajabhat-University-Hotels.0-l6306822-0.Travel-Guide-Filter-Hotels) - [Hotels near Central Udon ](https://www.expedia.com/Central-Plaza-Udon-Thani-Hotels.0-l6306840-0.Travel-Guide-Filter-Hotels) - [Hotels near UD Town ](https://www.expedia.com/UD-Town-Hotels.0-l6306842-0.Travel-Guide-Filter-Hotels) - [Hotels near Queen Sirikit Memorial Park ](https://www.expedia.com/Queen-Sirikit-Memorial-Park-Hotels.0-l553248635921055358-0.Travel-Guide-Filter-Hotels) - [Resorts & Hotels with Spas in Udon Thani Province ](https://www.expedia.com/Destinations-In-Udon-Thani-Province-Spa-Hotel.0-0-d6241932-tSpaHotel.Hotel-Filter-Destinations) - [Family Hotels in Udon Thani Province ](https://www.expedia.com/Destinations-In-Udon-Thani-Province-Family-Hotel.0-0-d6241932-tFamilyHotel.Hotel-Filter-Destinations) - 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