
$139 Cheap flight deals from St. Louis (STL) to Great Diamond Island (PWM)
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Airfares from $139 One Way, $407 Round Trip from St. Louis to Great Diamond Island
Prices starting at $407 for return flights and $139 for one-way flights to Great Diamond Island were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Great Diamond Island economy flight packages

Clarion Hotel Portland Airport ME
Dec 31 - Jan 4
St. Louis (STL) to Portland (PWM)
Reviewed on Nov 16, 2025

Portland Regency Hotel & Spa
Dec 31 - Jan 4
St. Louis (STL) to Portland (PWM)
Reviewed on Sep 12, 2025

Holiday Inn Portland-By the Bay by IHG
Dec 31 - Jan 4
St. Louis (STL) to Portland (PWM)
Reviewed on Oct 6, 2025
More About Flying To Great Diamond Island from St. Louis
Route Information for Flights from St. Louis to Great Diamond Island
Origin Airport IATA Code | STL |
|---|---|
Destination Airport IATA Code | PWM |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
St. Louis to Great Diamond Island
Trip-Planning Made Easy
Your search engine may give you thousands of pages of results when you search for cheap flights from St. Louis to Great Diamond Island, but you can save yourself a lot of hassle and money by going straight to Orbitz.com. Not only do we offer great deals on St. Louis to Great Diamond Island flights, but we make it easy to book hotels, car rentals, cruises, or a complete vacation package of your dreams.
Discount St. Louis to Great Diamond Island Flights
Orbitz’s low price guarantee means you get the best fares around. Find the lowest prices for international and domestic tickets and for flights from St. Louis to Great Diamond Island when you use Orbitz. It’s easy to add activities to your booking, so you can take advantage of all that Great Diamond Island has to offer.
Easily Book, Change, Cancel Flights From St. Louis to Great Diamond Island
Orbitz now offers free mobile device apps, so even the busiest multi-taskers can plan their vacations while away from their desktop computer. Plus, instant alerts to your email or mobile phone help you stay on top of any delays or travel updates, so you avoid unpleasant surprises before boarding your St. Louis to Great Diamond Island flights. Our Customer Service representatives are ready to assist you if you need to change your air travel plans.
Take Advantage of Frequent Flyer Options Through Orbitz
With Orbitz, you do not have to choose between a low fare and earning frequent flyer miles. Simply provide your frequent flyer information when you book your St. Louis to Great Diamond Island flights.
Flights from St. Louis
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St. Louis Airports
Great Diamond Island Airports
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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.
Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.
Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.

