Find out what a flight from Boston to Saint Louis might cost

Prices vary based on date, airline, and availability. Compare several options if you're flying between Boston and Saint Louis.

Select your dates to check current offers.

Try shifting your departure forward or backward by a day to find better options. If you’re looking for a good deal, consider flying outside peak hours as well.

Is there more than one airport in Boston or Saint Louis?

Even short-haul routes can benefit from considering secondary airports. It may open up more flight times or cheaper fares.

• Airports in Boston: Only Boston - Logan is currently operational.
• Airports in Saint Louis: Saint Louis - Lambert is the only airport in operation.

Airports with more daily flights offer more flexibility if plans change or delays occur. If you’re flexible, consider airports near Saint Louis as well.

Adjust your flight filters for Boston – Saint Louis

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Other popular destinations

Planning a trip to United States? These cities are popular too: Las Vegas, Los Angeles, Miami, New York City, Orlando.

Sorting options let you see the most affordable flights first. Some results may include extra fees shown only at checkout — always read carefully to see what’s included.